diff --git a/src/platforms/h5/view/components/map/map-marker.js b/src/platforms/h5/view/components/map/map-marker.js
index 3d47d00f48a521ab6edd618c1d883c38f2e10acc..63e35e282458eae3be5a8fe50a28fb6cb9c29e2a 100644
--- a/src/platforms/h5/view/components/map/map-marker.js
+++ b/src/platforms/h5/view/components/map/map-marker.js
@@ -131,7 +131,7 @@ export default {
           w = img.width / 2
           h = img.height / 2
         }
-        const top = h - (h - y)
+        const top = h - (h - y * h)
         if ('MarkerImage' in maps) {
           icon = new maps.MarkerImage(
             img.src,
@@ -189,6 +189,7 @@ export default {
         let callout = marker.callout
         let calloutStyle
         if (calloutOpt.content || title) {
+          const boxShadow = '0px 0px 3px 1px rgba(0,0,0,0.5)'
           calloutStyle = calloutOpt.content
             ? {
               position,
@@ -200,7 +201,7 @@ export default {
               borderRadius: calloutOpt.borderRadius,
               bgColor: calloutOpt.bgColor,
               padding: calloutOpt.padding,
-              boxShadow: calloutOpt.boxShadow,
+              boxShadow: calloutOpt.boxShadow || boxShadow,
               display: calloutOpt.display
             }
             : {
@@ -208,7 +209,7 @@ export default {
               map,
               top,
               content: title,
-              boxShadow: '0px 0px 3px 1px rgba(0,0,0,0.5)'
+              boxShadow: boxShadow
             }
           if (callout) {
             callout.setOption(calloutStyle)
diff --git a/src/platforms/h5/view/components/map/maps/callout.js b/src/platforms/h5/view/components/map/maps/callout.js
index 3e9f81327b62cc89aa63a1d4a071356635d6d581..5d7a8fa54e4d2ba0346b81090d55ed01b82eade6 100644
--- a/src/platforms/h5/view/components/map/maps/callout.js
+++ b/src/platforms/h5/view/components/map/maps/callout.js
@@ -107,6 +107,11 @@ export function createCallout (maps) {
 
     destroy = onRemove
   }
-  Callout.prototype = overlay
+  const prototype = Callout.prototype
+  for (const key in overlay) {
+    if (!(key in prototype)) {
+      prototype[key] = overlay[key]
+    }
+  }
   return Callout
 }