diff --git a/resources/catalog.json b/resources/catalog.json
index e371dc0..84c5c6e 100644
--- a/resources/catalog.json
+++ b/resources/catalog.json
@@ -68257,14 +68257,14 @@
       "fields": [
         {
           "key": "file_path",
-          "label": "图片地址",
+          "label": "源图片地址",
           "widget": "file",
           "type": "object",
           "displayType": "selectFile",
           "required": true,
           "defaultValue": "",
           "placeholder": "请输入或选择文件路径",
-          "description": "图片文件的完整路径，用于匹配或识别；点右侧按钮选择文件",
+          "description": "要被裁剪的源图片完整路径——本组件从已有图片文件中裁出区域，不是截屏；截屏请用「截图图像」组件",
           "advanced": false,
           "valueTypes": [
             "rpa_str_file",
@@ -68296,7 +68296,7 @@
           "required": true,
           "defaultValue": "1",
           "placeholder": "请输入坐标点",
-          "description": "填写参数值，支持 ${变量} 引用上游输出",
+          "description": "裁剪区域左上角的 x 坐标（图片上的像素）",
           "advanced": false,
           "valueTypes": [
             "rpa_int"
@@ -68311,7 +68311,7 @@
           "required": true,
           "defaultValue": "1",
           "placeholder": "请输入坐标点",
-          "description": "填写参数值，支持 ${变量} 引用上游输出",
+          "description": "裁剪区域右下角的 x 坐标，需大于起点 x",
           "advanced": false,
           "valueTypes": [
             "rpa_int"
@@ -68326,7 +68326,7 @@
           "required": true,
           "defaultValue": "1",
           "placeholder": "请输入坐标点",
-          "description": "填写参数值，支持 ${变量} 引用上游输出",
+          "description": "裁剪区域左上角的 y 坐标（图片上的像素）",
           "advanced": false,
           "valueTypes": [
             "rpa_int"
@@ -68341,7 +68341,7 @@
           "required": true,
           "defaultValue": "1",
           "placeholder": "请输入坐标点",
-          "description": "填写参数值，支持 ${变量} 引用上游输出",
+          "description": "裁剪区域右下角的 y 坐标，需大于起点 y",
           "advanced": false,
           "valueTypes": [
             "rpa_int"
diff --git a/src/main/capabilities/remaining-core.ts b/src/main/capabilities/remaining-core.ts
index 61956d9..6f67b43 100644
--- a/src/main/capabilities/remaining-core.ts
+++ b/src/main/capabilities/remaining-core.ts
@@ -171,8 +171,13 @@ register("Image_Base64Decode", async (_ctx, _node, args) => {
   fs.mkdirSync(path.dirname(file), { recursive: true }); fs.writeFileSync(file, Buffer.from(value, "base64")); return file;
 });
 register("Image_CropImg", async (_ctx, node, args) => {
-  const input = path.resolve(text(args, ["file_path", "imagePath", "path"])); const output = path.resolve(text(args, ["output"], input.replace(/(\.[^.]+)$/, "-crop$1")));
+  const rawInput = text(args, ["file_path", "imagePath", "path"]);
+  if (!rawInput.trim()) throw new RuntimeError("validation_error", "图片地址不能为空", { nodeId: node.id, componentId: node.componentId, recommendation: "填写要裁剪的源图片完整路径（如 D:\\images\\shot.png），该组件是从已有图片文件里裁剪区域，不是截屏" });
+  const input = path.resolve(rawInput);
+  if (!fs.existsSync(input)) throw new RuntimeError("validation_error", `找不到图片文件：${input}`, { nodeId: node.id, componentId: node.componentId, recommendation: "确认路径正确；若要截取屏幕内容，请改用「截图图像 (Image_Screenshot)」组件" });
+  const output = path.resolve(text(args, ["output"], input.replace(/(\.[^.]+)$/, "-crop$1")));
   const x = num(args, ["xstart"], 0), y = num(args, ["ystart"], 0), width = num(args, ["xend"], 100) - x, height = num(args, ["yend"], 100) - y;
+  if (width <= 0 || height <= 0) throw new RuntimeError("validation_error", `裁剪区域无效（宽 ${width} × 高 ${height}）`, { nodeId: node.id, componentId: node.componentId, recommendation: "终点坐标需要大于起点坐标（单位是图片上的像素）" });
   fs.mkdirSync(path.dirname(output), { recursive: true });
   await powershell(`Add-Type -AssemblyName System.Drawing;$image=[System.Drawing.Image]::FromFile(${psString(input)});$rect=New-Object System.Drawing.Rectangle(${x},${y},${width},${height});$bitmap=New-Object System.Drawing.Bitmap($rect.Width,$rect.Height);$graphics=[System.Drawing.Graphics]::FromImage($bitmap);$graphics.DrawImage($image,New-Object System.Drawing.Rectangle(0,0,$rect.Width,$rect.Height),$rect,[System.Drawing.GraphicsUnit]::Pixel);$bitmap.Save(${psString(output)});$graphics.Dispose();$bitmap.Dispose();$image.Dispose()`);
   return output;