diff --git a/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp b/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp
index f3e53c2..0b810e9 100644
--- a/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp
+++ b/ArchitectureColoredPainting/src/Editor/GraphicElement.cpp
@@ -114,7 +114,7 @@ void SimpleElement::paint(QPainter* painter, QTransform transform, const LayerSt
 		else
 			maxScale = std::max(fabs(transform.m12() / sin(angle)), fabs(transform.m21() / sin(angle)));
 		double pixelRatio = maxScale * QGuiApplication::primaryScreen()->devicePixelRatio();
-		if (painterPath == painterPathPrev && styles.getHash() == stylesHashValue)
+		if (painterPath == painterPathPrev && styles.getHash() == stylesHashValue && pixelRatio == pixelRatioPrev)
 		{
 			transform.translate(movPrev.x(), movPrev.y());
 			painter->setTransform(transform.scale(1 / pixelRatio, 1 / pixelRatio));
@@ -130,6 +130,7 @@ void SimpleElement::paint(QPainter* painter, QTransform transform, const LayerSt
 			painterPathPrev = painterPath;
 			imagePrev = img;
 			movPrev = mov;
+			pixelRatioPrev = pixelRatio;
 		}
 
 	}
diff --git a/ArchitectureColoredPainting/src/Editor/GraphicElement.h b/ArchitectureColoredPainting/src/Editor/GraphicElement.h
index 74368be..50073e4 100644
--- a/ArchitectureColoredPainting/src/Editor/GraphicElement.h
+++ b/ArchitectureColoredPainting/src/Editor/GraphicElement.h
@@ -27,6 +27,7 @@ public:
     QPainterPath painterPathPrev;
     QPointF movPrev;
 	QImage imagePrev;
+	double pixelRatioPrev;
     int index;
     // TODO: ¸ÄΪBitmapPath
 	virtual QJsonObject toJson() const = 0;