diff -Naur a/src/widgets/styles/qstylesheetstyle.cpp b/src/widgets/styles/qstylesheetstyle.cpp
--- a/src/widgets/styles/qstylesheetstyle.cpp	2021-08-11 11:36:05.811389639 +0800
+++ b/src/widgets/styles/qstylesheetstyle.cpp	2021-08-11 13:32:16.259120027 +0800
@@ -6133,11 +6133,19 @@
         else
             ratio = 1.0;
     }
-
+   
     qreal sourceDevicePixelRatio = 1.0;
-    QString resolvedFileName = qt_findAtNxFile(fileName, ratio, &sourceDevicePixelRatio);
+    qreal devicePixelRatio = qApp->devicePixelRatio();
+    QString resolvedFileName = qt_findAtNxFile(fileName, devicePixelRatio, &sourceDevicePixelRatio);
     QPixmap pixmap(resolvedFileName);
-    pixmap.setDevicePixelRatio(sourceDevicePixelRatio);
+    if (sourceDevicePixelRatio > 1.0) {
+        pixmap = pixmap.scaled(devicePixelRatio / sourceDevicePixelRatio * pixmap.width(), 
+                               devicePixelRatio / sourceDevicePixelRatio * pixmap.height(), 
+                               Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+        pixmap.setDevicePixelRatio(devicePixelRatio);
+    } else {
+        pixmap.setDevicePixelRatio(sourceDevicePixelRatio);
+    }
     return pixmap;
 }