The invention provides a push rod mechanism, and the mechanism can achieve the switching and multi-position adjustment functions of a product on one operating surface through one switch. The mechanism comprises a driving rod and a driven rod, and the driving rod drives the driven rod to move. The driving rod and the driven rod are respectively provided with a switching unit. The driven rod is provided with a guide hole, and the driving rod comprises a working part. The working part comprises a multistep stair, and moves step by step in the guide hole along a step surface to completely enter or leave from the guide hole.