The invention relates to the technical field of wastewater treatment and discloses a wastewater treatment valve polishing device convenient to adjust. The wastewater treatment valve polishing device comprises a device body. A top plate is fixedly connected to the top of the device body. A base is fixedly connected to the bottom inside the device body. A driving motor is fixedly connected to the top of the base. A rotating shaft is fixedly connected with an output shaft of the driving motor through a coupling. A driving wheel is fixedly connected to the outer surface of the rotating shaft in asleeving manner. According to the wastewater treatment valve polishing device convenient to adjust, the driving wheel is driven to rotate through operation of the driving motor and is in transmissionconnection with a driven wheel through a transmission belt; the rotating shaft is connected to the middle of the driven wheel in an inserted manner; a workbench is fixedly connected to the top of therotating shaft, and therefore, a valve on the workbench can be driven to perform circular motion; thus, the surface of the valve can be ground through a polishing machine conveniently, and the problemthat people need to adjust the angle of the valve continuously when grinding the surface of the valve is avoided; and time and labor are saved, and polishing efficiency is improved.