diff --git a/backend/config/server_config.json b/backend/config/server_config.json
index 071b1b1..37b51f1 100644
--- a/backend/config/server_config.json
+++ b/backend/config/server_config.json
@@ -11,6 +11,7 @@
     "document_root": "./web",
     "upload_path": "uploads",
     "client_max_body_size": "10M",
+    "client_max_memory_body_size": "20M",
     "max_connections": 1000,
     "log": {
       "log_path": "",
diff --git a/frontend/web_app/src/App.css b/frontend/web_app/src/App.css
index dc47007..39dfc5f 100644
--- a/frontend/web_app/src/App.css
+++ b/frontend/web_app/src/App.css
@@ -75,6 +75,45 @@
   color: #fde68a;
 }
 
+.editToolGroup {
+  display: inline-flex;
+  align-items: center;
+  overflow: hidden;
+  border: 1px solid #343449;
+  border-radius: 8px;
+  background: #151520;
+}
+
+.toolButton {
+  min-height: 34px;
+  border: 0;
+  border-right: 1px solid #343449;
+  background: transparent;
+  color: #cbd5e1;
+  padding: 0 12px;
+  font-size: 13px;
+  font-weight: 600;
+  cursor: pointer;
+}
+
+.toolButton:last-child {
+  border-right: 0;
+}
+
+.toolButton:hover {
+  background: #24243a;
+}
+
+.toolButton.active {
+  background: rgba(251, 191, 36, 0.14);
+  color: #fde68a;
+}
+
+.toolButton.erase.active {
+  background: rgba(248, 113, 113, 0.14);
+  color: #fecaca;
+}
+
 .uploadButton input {
   display: none;
 }
@@ -607,6 +646,16 @@ select:focus {
   background: rgba(251, 191, 36, 0.16);
 }
 
+.chartBrush.erase {
+  border-color: rgba(248, 113, 113, 0.95);
+  background: rgba(248, 113, 113, 0.08);
+  box-shadow: 0 0 0 1px rgba(16, 16, 26, 0.8), 0 0 18px rgba(248, 113, 113, 0.24);
+}
+
+.chartBrush.erase.dragging {
+  background: rgba(248, 113, 113, 0.16);
+}
+
 .chartTools {
   display: flex;
   align-items: center;
diff --git a/frontend/web_app/src/pages/HomePage.jsx b/frontend/web_app/src/pages/HomePage.jsx
index dbf426b..eefc94c 100644
--- a/frontend/web_app/src/pages/HomePage.jsx
+++ b/frontend/web_app/src/pages/HomePage.jsx
@@ -49,7 +49,9 @@ const DESIGN_FIELD_HINTS = {
 
 const CHUNK_SIZE = 4000;
 const CHART_HEIGHT = 540;
-const BRUSH_RADIUS = 16;
+const BRUSH_RADIUS = 10;
+const EDIT_TOOL_RESTORE = 'restore';
+const EDIT_TOOL_ERASE = 'erase';
 const DEFAULT_SCHEME_ID = 'scheme_one';
 const SCHEME_TWO_ID = 'scheme_two';
 const DEFAULT_SCHEMES = [
@@ -436,7 +438,9 @@ function PowerCurveChart({
   showFiltered,
   designPoints,
   editMode,
+  editTool,
   onRestorePoints,
+  onErasePoints,
 }) {
   const frameRef = useRef(null);
   const chartRef = useRef(null);
@@ -587,14 +591,17 @@ function PowerCurveChart({
         dragging: nextDragging,
       });
     };
-    const restoreAt = (event) => {
-      if (!chart.over || !onRestorePoints) return;
+    const applyToolAt = (event) => {
+      if (!chart.over) return;
       const rect = chart.over.getBoundingClientRect();
       const x = event.clientX - rect.left;
       const y = event.clientY - rect.top;
       const radiusSquared = BRUSH_RADIUS * BRUSH_RADIUS;
-      const restored = [];
-      for (const point of validFiltered) {
+      const targetPoints = editTool === EDIT_TOOL_ERASE
+        ? validScatter
+        : validFiltered.filter((point) => point.reason !== 'manual_erased');
+      const hitPoints = [];
+      for (const point of targetPoints) {
         const pointX = chart.valToPos(point.wind_speed, 'x');
         const pointY = chart.valToPos(point.active_power, 'y');
         if (!Number.isFinite(pointX) || !Number.isFinite(pointY)) {
@@ -603,11 +610,16 @@ function PowerCurveChart({
         const dx = pointX - x;
         const dy = pointY - y;
         if (dx * dx + dy * dy <= radiusSquared) {
-          restored.push(point);
+          hitPoints.push(point);
         }
       }
-      if (restored.length) {
-        onRestorePoints(restored);
+      if (!hitPoints.length) {
+        return;
+      }
+      if (editTool === EDIT_TOOL_ERASE) {
+        onErasePoints?.(hitPoints);
+      } else {
+        onRestorePoints?.(hitPoints);
       }
     };
     const handlePointerDown = (event) => {
@@ -615,12 +627,12 @@ function PowerCurveChart({
       event.preventDefault();
       dragging = true;
       updateBrush(event, true);
-      restoreAt(event);
+      applyToolAt(event);
     };
     const handlePointerMove = (event) => {
       updateBrush(event);
       if (dragging) {
-        restoreAt(event);
+        applyToolAt(event);
       }
     };
     const handlePointerUp = (event) => {
@@ -647,7 +659,9 @@ function PowerCurveChart({
     validDesign,
     showFiltered,
     editMode,
+    editTool,
     onRestorePoints,
+    onErasePoints,
   ]);
 
   useEffect(() => {
@@ -661,7 +675,12 @@ function PowerCurveChart({
   }
 
   return (
-    <div className={`chartFrame ${editMode ? 'chartFrameEditing' : ''}`} ref={frameRef}>
+    <div
+      className={`chartFrame ${editMode ? 'chartFrameEditing' : ''} ${
+        editTool === EDIT_TOOL_ERASE ? 'chartFrameErasing' : ''
+      }`}
+      ref={frameRef}
+    >
       <div className="chartLegend">
         <span><i className="legendDot scatter" />散点数据</span>
         <span><i className="legendLine actual" />实际功率</span>
@@ -670,7 +689,9 @@ function PowerCurveChart({
       <div className="uplotWrap" ref={chartRef} />
       {editMode && brush.visible && (
         <div
-          className={`chartBrush ${brush.dragging ? 'dragging' : ''}`}
+          className={`chartBrush ${editTool === EDIT_TOOL_ERASE ? 'erase' : ''} ${
+            brush.dragging ? 'dragging' : ''
+          }`}
           style={{
             width: BRUSH_RADIUS * 2,
             height: BRUSH_RADIUS * 2,
@@ -693,7 +714,9 @@ export default function HomePage() {
   const [selectedFan, setSelectedFan] = useState('');
   const [showFiltered, setShowFiltered] = useState(false);
   const [isEditMode, setIsEditMode] = useState(false);
+  const [editTool, setEditTool] = useState(EDIT_TOOL_RESTORE);
   const [restoredPointIds, setRestoredPointIds] = useState({});
+  const [erasedPointIds, setErasedPointIds] = useState({});
   const [readingDesign, setReadingDesign] = useState(false);
   const [designRows, setDesignRows] = useState(() => createDesignRows());
   const [designMeta, setDesignMeta] = useState(null);
@@ -710,9 +733,16 @@ export default function HomePage() {
   const isSchemeTwo = selectedSchemeId === SCHEME_TWO_ID;
   const selectedPoints = selectedFan && result?.curves ? result.curves[selectedFan] || [] : [];
   const selectedBins = selectedFan && result?.bins ? result.bins[selectedFan] || [] : [];
-  const selectedScatter = selectedFan && result?.scatter_points
+  const selectedScatterRaw = selectedFan && result?.scatter_points
     ? result.scatter_points[selectedFan] || []
     : [];
+  const selectedScatter = useMemo(
+    () => withPointIds(selectedScatterRaw, selectedFan).map((point) => ({
+      ...point,
+      edit_origin: 'scatter',
+    })),
+    [selectedScatterRaw, selectedFan],
+  );
   const selectedFilteredRaw = selectedFan && result?.filtered_points
     ? result.filtered_points[selectedFan] || []
     : [];
@@ -724,17 +754,40 @@ export default function HomePage() {
     () => new Set(restoredPointIds[selectedFan] || []),
     [restoredPointIds, selectedFan],
   );
+  const selectedErasedIdSet = useMemo(
+    () => new Set(erasedPointIds[selectedFan] || []),
+    [erasedPointIds, selectedFan],
+  );
   const restoredFilteredPoints = useMemo(
-    () => selectedFiltered.filter((point) => selectedRestoredIdSet.has(point.point_id)),
+    () => selectedFiltered
+      .filter((point) => selectedRestoredIdSet.has(point.point_id))
+      .map((point) => ({ ...point, edit_origin: 'restored_filtered' })),
     [selectedFiltered, selectedRestoredIdSet],
   );
+  const effectiveBaseScatter = useMemo(
+    () => selectedScatter.filter((point) => !selectedErasedIdSet.has(point.point_id)),
+    [selectedScatter, selectedErasedIdSet],
+  );
+  const erasedScatterPoints = useMemo(
+    () => selectedScatter
+      .filter((point) => selectedErasedIdSet.has(point.point_id))
+      .map((point) => ({
+        ...point,
+        reason: 'manual_erased',
+        edit_origin: 'erased_scatter',
+      })),
+    [selectedScatter, selectedErasedIdSet],
+  );
   const visibleFilteredPoints = useMemo(
-    () => selectedFiltered.filter((point) => !selectedRestoredIdSet.has(point.point_id)),
-    [selectedFiltered, selectedRestoredIdSet],
+    () => [
+      ...selectedFiltered.filter((point) => !selectedRestoredIdSet.has(point.point_id)),
+      ...erasedScatterPoints,
+    ],
+    [selectedFiltered, selectedRestoredIdSet, erasedScatterPoints],
   );
   const effectiveScatter = useMemo(
-    () => [...selectedScatter, ...restoredFilteredPoints],
-    [selectedScatter, restoredFilteredPoints],
+    () => [...effectiveBaseScatter, ...restoredFilteredPoints],
+    [effectiveBaseScatter, restoredFilteredPoints],
   );
   const selectedEstimatedParams = selectedFan && result?.estimated_params
     ? result.estimated_params[selectedFan]
@@ -760,11 +813,59 @@ export default function HomePage() {
     });
   }, [selectedFan]);
 
+  const handleErasePoints = useCallback((pointsToErase) => {
+    if (!selectedFan || !pointsToErase.length) return;
+    const restoredIdsToRemove = [];
+    const erasedIdsToAdd = [];
+    for (const point of pointsToErase) {
+      const pointId = point.point_id || createPointId(point, selectedFan);
+      if (point.edit_origin === 'restored_filtered') {
+        restoredIdsToRemove.push(pointId);
+      } else {
+        erasedIdsToAdd.push(pointId);
+      }
+    }
+    if (restoredIdsToRemove.length) {
+      setRestoredPointIds((prev) => {
+        const currentIds = new Set(prev[selectedFan] || []);
+        let changed = false;
+        for (const pointId of restoredIdsToRemove) {
+          if (currentIds.delete(pointId)) {
+            changed = true;
+          }
+        }
+        if (!changed) return prev;
+        return {
+          ...prev,
+          [selectedFan]: Array.from(currentIds),
+        };
+      });
+    }
+    if (erasedIdsToAdd.length) {
+      setErasedPointIds((prev) => {
+        const nextIds = new Set(prev[selectedFan] || []);
+        let changed = false;
+        for (const pointId of erasedIdsToAdd) {
+          if (!nextIds.has(pointId)) {
+            nextIds.add(pointId);
+            changed = true;
+          }
+        }
+        if (!changed) return prev;
+        return {
+          ...prev,
+          [selectedFan]: Array.from(nextIds),
+        };
+      });
+    }
+  }, [selectedFan]);
+
   const handleToggleEditMode = useCallback(() => {
     setIsEditMode((prev) => {
       const next = !prev;
       if (next) {
         setShowFiltered(true);
+        setEditTool(EDIT_TOOL_RESTORE);
       }
       return next;
     });
@@ -896,7 +997,9 @@ export default function HomePage() {
     setSelectedFan('');
     setShowFiltered(false);
     setIsEditMode(false);
+    setEditTool(EDIT_TOOL_RESTORE);
     setRestoredPointIds({});
+    setErasedPointIds({});
     try {
       const parsedFiles = [];
       for (const file of selectedFiles) {
@@ -984,7 +1087,9 @@ export default function HomePage() {
     setResult(null);
     setShowFiltered(false);
     setIsEditMode(false);
+    setEditTool(EDIT_TOOL_RESTORE);
     setRestoredPointIds({});
+    setErasedPointIds({});
     setProgress('正在准备标准化数据');
 
     try {
@@ -1369,10 +1474,32 @@ export default function HomePage() {
                   className={`secondaryButton ${isEditMode ? 'active' : ''}`}
                   type="button"
                   onClick={handleToggleEditMode}
-                  disabled={!selectedFiltered.length && !isEditMode}
+                  disabled={!selectedFiltered.length && !effectiveScatter.length && !isEditMode}
                 >
                   {isEditMode ? '退出编辑' : '进入编辑'}
                 </button>
+                {isEditMode && (
+                  <div className="editToolGroup" aria-label="编辑工具">
+                    <button
+                      className={`toolButton ${
+                        editTool === EDIT_TOOL_RESTORE ? 'active' : ''
+                      }`}
+                      type="button"
+                      onClick={() => setEditTool(EDIT_TOOL_RESTORE)}
+                    >
+                      笔刷
+                    </button>
+                    <button
+                      className={`toolButton erase ${
+                        editTool === EDIT_TOOL_ERASE ? 'active' : ''
+                      }`}
+                      type="button"
+                      onClick={() => setEditTool(EDIT_TOOL_ERASE)}
+                    >
+                      橡皮擦
+                    </button>
+                  </div>
+                )}
                 <button
                   className="secondaryButton"
                   type="button"
@@ -1414,7 +1541,9 @@ export default function HomePage() {
               showFiltered={showFiltered || isEditMode}
               designPoints={designCurve}
               editMode={isEditMode}
+              editTool={editTool}
               onRestorePoints={handleRestorePoints}
+              onErasePoints={handleErasePoints}
             />
           </div>