diff --git a/pages/upload/camera_capture.nvue b/pages/upload/camera_capture.nvue
index c567c35..ef4acf2 100644
--- a/pages/upload/camera_capture.nvue
+++ b/pages/upload/camera_capture.nvue
@@ -3,7 +3,7 @@
 		<!-- 正方形相机预览（全屏宽度） -->
 		<ima-camera-view
 			ref="cameraRef"
-			:style="'width:' + camSize + 'px;height:' + camSize + 'px;'"
+			:style="'width:' + camSize + 'px;height:' + camSize + 'px;margin-top:' + frameTop + 'px;margin-left:' + frameLeft + 'px;'"
 			flash="off"
 			facing="back"
 			:widthRatio="1"
@@ -81,6 +81,8 @@
 				winWidth: 750,
 				winHeight: 1334,
 				camSize: 750,
+				frameTop: 0,
+				frameLeft: 0,
 				previewVisible: false,
 				previewSrc: '',
 				previewSize: 600
@@ -94,6 +96,16 @@
 					that.winHeight = res.windowHeight
 					that.camSize = res.windowWidth
 					that.previewSize = Math.floor(res.windowWidth * 0.85)
+					// 垂直居中：顶部栏110px + 底部操作栏240px
+					var barH = 110
+					var bottomArea = 240
+					var availableH = res.windowHeight - barH - bottomArea
+					if (res.windowWidth < availableH) {
+						that.frameTop = barH + Math.floor((availableH - res.windowWidth) / 2)
+					} else {
+						that.frameTop = barH
+					}
+					that.frameLeft = 0
 				}
 			})
 		},