diff --git a/dde-dock.pro b/dde-dock.pro
index f0dc9c0b0..08b696d90 100644
--- a/dde-dock.pro
+++ b/dde-dock.pro
@@ -3,7 +3,6 @@ TEMPLATE = subdirs
 SUBDIRS = frame \
           plugins
 
-
 # Automating generation .qm files from .ts files
 CONFIG(release, debug|release) {
     !system($$PWD/translate_generation.sh): error("Failed to generate translation")
diff --git a/frame/item/components/appsnapshot.cpp b/frame/item/components/appsnapshot.cpp
index 9e03e183c..6ce530214 100644
--- a/frame/item/components/appsnapshot.cpp
+++ b/frame/item/components/appsnapshot.cpp
@@ -55,12 +55,12 @@ AppSnapshot::AppSnapshot(const WId wid, QWidget *parent)
 
     setLayout(centralLayout);
     setAcceptDrops(true);
+    setFixedSize(SNAP_WIDTH, SNAP_HEIGHT);
 
     connect(m_closeBtn, &DImageButton::clicked, this, &AppSnapshot::closeWindow, Qt::QueuedConnection);
     connect(m_wmHelper, &DWindowManagerHelper::hasCompositeChanged, this, &AppSnapshot::compositeChanged, Qt::QueuedConnection);
 
     QTimer::singleShot(1, this, &AppSnapshot::compositeChanged);
-//    QTimer::singleShot(1, this, &AppSnapshot::fetchSnapshot);
 }
 
 void AppSnapshot::closeWindow() const
@@ -147,6 +147,11 @@ void AppSnapshot::fetchSnapshot()
         m_snapshot = qimage.copy();
     }
 
+    const auto size = rect().marginsRemoved(QMargins(8, 8, 8, 8)).size();
+    const auto ratio = devicePixelRatioF();
+    m_snapshot = m_snapshot.scaled(size * ratio, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    m_snapshot.setDevicePixelRatio(ratio);
+
     XDestroyImage(ximage);
     XFree(prop_to_return);
 
@@ -190,8 +195,9 @@ void AppSnapshot::paintEvent(QPaintEvent *e)
     const auto ratio = devicePixelRatioF();
 
     // draw image
-    QImage im = m_snapshot.scaled(r.size() * ratio, Qt::KeepAspectRatio, Qt::SmoothTransformation);
-    im.setDevicePixelRatio(ratio);
+//    QImage im = m_snapshot.scaled(r.size() * ratio, Qt::KeepAspectRatio, Qt::SmoothTransformation);
+//    im.setDevicePixelRatio(ratio);
+    const QImage &im = m_snapshot;
 
     const QRect ir = im.rect();
     const int offset_x = r.x() + r.width() / 2 - ir.width() / ratio / 2;
diff --git a/frame/item/components/appsnapshot.h b/frame/item/components/appsnapshot.h
index 2bda9a827..cd0db0a64 100644
--- a/frame/item/components/appsnapshot.h
+++ b/frame/item/components/appsnapshot.h
@@ -32,6 +32,9 @@
 
 DWIDGET_USE_NAMESPACE
 
+#define SNAP_WIDTH       200
+#define SNAP_HEIGHT      130
+
 class AppSnapshot : public QWidget
 {
     Q_OBJECT
diff --git a/frame/item/components/previewcontainer.h b/frame/item/components/previewcontainer.h
index 39e97c861..d6ee181cf 100644
--- a/frame/item/components/previewcontainer.h
+++ b/frame/item/components/previewcontainer.h
@@ -33,9 +33,6 @@
 
 #include <DWindowManagerHelper>
 
-#define SNAP_WIDTH       200
-#define SNAP_HEIGHT      130
-
 DWIDGET_USE_NAMESPACE
 
 class PreviewContainer : public QWidget