diff --git a/plugins/dde-dock/sound/soundapplet.cpp b/plugins/dde-dock/sound/soundapplet.cpp
index 8d9cfef2b..5c7711cb2 100644
--- a/plugins/dde-dock/sound/soundapplet.cpp
+++ b/plugins/dde-dock/sound/soundapplet.cpp
@@ -69,6 +69,7 @@ void SoundApplet::initUi()
     m_volumeSlider->setMinimum(0);
     m_volumeSlider->setMaximum(SoundModel::ref().maxVolumeUI());
     m_volumeSlider->slider()->setTracking(false);
+    m_volumeSlider->setPageStep(2);
     m_sliderContainer->setSlider(m_volumeSlider);
     m_sliderContainer->addBackground();
     m_sliderContainer->setButtonsSize(QSize(16, 16));