Polishing device for drilling machine machining

A lifting mechanism is arranged in a base and used for lifting materials needing to be polished, a lifting groove is formed in the inner wall of the upper end of one side, corresponding to the lifting mechanism, of the base, a lifting block is arranged on the inner wall of the lifting groove in a sliding mode, and a limiting block is arranged on the outer wall of one side of the lifting block. The polishing device has the following advantages that the third rotating disc is rotated to drive the first lifting rod to rotate, so that the first lifting rod belt drives the second lifting rod to rotate, the upper end threads of the first lifting rod and the second lifting rod drive the lifting block to move up and down in the lifting groove, and the height of materials needing to be polished is adjusted; and then a supporting plate can be driven to move on a lifting block by rotating a first rotating disc thread, then a second rotating disc is rotated to conveniently drive a shelf to move on the supporting plate by