diff --git a/Assets/Scripts/FixSystem/HeatMap/HeatMapController.cs b/Assets/Scripts/FixSystem/HeatMap/HeatMapController.cs
index a376eaddd..06d0ce9c2 100644
--- a/Assets/Scripts/FixSystem/HeatMap/HeatMapController.cs
+++ b/Assets/Scripts/FixSystem/HeatMap/HeatMapController.cs
@@ -20,6 +20,9 @@ public class HeatMapController : MonoBehaviour
 
     public RectTransform imageToMove; // 需要移动的Image
     public Transform imageToRotate; // 需要旋转的Image
+    [Header("拖拽")]
+    [Tooltip("在不改变视觉和布局的前提下，向左右/上下扩展拖拽命中范围。")]
+    [SerializeField] private Vector2 dragHitAreaExpansion = new Vector2(5.2f, 0.3f);
     [SerializeField, Min(0f)] private float fanStopDuration = 0.15f;
     [Tooltip("相对 Sprite 矩形中心的额外旋转轴偏移（本地空间，单位与 Transform 一致）。用于校准扇毂不在图心时的偏心。")]
     [SerializeField] private Vector2 fanPivotLocalOffset;
@@ -227,10 +230,31 @@ public class HeatMapController : MonoBehaviour
     void Start()
     {
         bodyModuleSystem = FindObjectOfType<BodyModuleSystem>();
+        ApplyDragHitArea();
         EnsureFanPivot();
         SetDataToMaterial();
     }
 
+    private void ApplyDragHitArea()
+    {
+        if (heatmapGameobject == null)
+            return;
+
+        var dragGraphic = heatmapGameobject.GetComponent<Graphic>();
+        if (dragGraphic == null)
+        {
+            Debug.LogWarning("[HeatMapController] 拖拽对象缺少 Graphic，无法扩展拖拽命中范围。", heatmapGameobject);
+            return;
+        }
+
+        float horizontal = Mathf.Max(0f, dragHitAreaExpansion.x);
+        float vertical = Mathf.Max(0f, dragHitAreaExpansion.y);
+
+        // Graphic 使用负 raycastPadding 扩展命中区；不会改变 RectTransform，
+        // 因而不会移动右上角按钮或拉伸热力图内容。
+        dragGraphic.raycastPadding = new Vector4(-horizontal, -vertical, -horizontal, -vertical);
+    }
+
     void OnDestroy()
     {
         _temptureTween?.Kill();