Automatic striking hammer

The utility model discloses an automatic striking hammer which comprises a rectangular steel beam, a stand column is fixedly connected to the side surface of the rectangular steel beam, a steel plate is fixedly connected to the side surface of the stand column, a rotating disc is fixedly connected to the upper surface of the steel plate, and a supporting block is fixedly connected to the upper surface of the rotating disc. A fixed base is fixedly connected to the upper surface of the supporting block, a workpiece protection shell is fixedly connected to the upper surface of the fixed base, and a first connecting steel plate and a lifting device are fixedly connected to the upper surface of the rectangular steel beam; the lifting device comprises a motor, a threaded lead screw, a lifting plate, a positioning column, a guide rail, a first sleeve, a second sleeve, a limiting sleeve and a second connecting steel plate, the lower surface of the second connecting steel plate is fixedly connected with an electric co