diff --git a/packages/designer/src/builtin-simulator/host.less b/packages/designer/src/builtin-simulator/host.less
index d5e29f31d..f763c732f 100644
--- a/packages/designer/src/builtin-simulator/host.less
+++ b/packages/designer/src/builtin-simulator/host.less
@@ -30,15 +30,16 @@
   }
 
   &-device-iphonex { // 增加默认的小程序的壳
-    left: calc(~"50% - 189px");
-    top: calc(~"50% - 406px");
+    left: 50%;
+    top: 50%;
+    transform: translate(-50%, -50%);
     width: 378px;
-    max-height: 812px;
+    height: 812px;
+    max-height: calc(100vh - 50px);
     background: url(https://img.alicdn.com/tfs/TB1b4DHilFR4u4jSZFPXXanzFXa-750-1574.png) no-repeat top;
     background-size: 378px 812px;
     border-radius: 44px;
     box-shadow: rgba(0, 0, 0, 0.1) 0px 36px 42px;
-    transform: scale(1);
     .@{scope}-canvas-viewport {
       width: auto;
       top: 50px;
diff --git a/packages/rax-simulator-renderer/package.json b/packages/rax-simulator-renderer/package.json
index 36d44c1a5..9c4f6a759 100644
--- a/packages/rax-simulator-renderer/package.json
+++ b/packages/rax-simulator-renderer/package.json
@@ -55,5 +55,5 @@
       "ts-node/register"
     ]
   },
-  "homepage": "https://unpkg.alibaba-inc.com/@ali/lowcode-rax-simulator-renderer@0.8.44/build/index.html"
+  "homepage": "https://unpkg.alibaba-inc.com/@ali/lowcode-rax-simulator-renderer@0.8.45/build/index.html"
 }