The invention relates to a wall polishing machine. The wall polishing machine comprises a connection rod, a shell and an installation frame. The outer side of the connection rod is provided with a control switch, and the outer side of the lower end of the connection rod is sleeved with a handle in an embedded manner. The shell is arranged at the upper end of the connection rod, the shell is internally connected with a motor through damping mechanisms. The outer side of the motor is connected with a dust cover through regulating mechanisms. One side of the dust cover is provided with rolling balls. One side of the motor is connected with a main shaft, and the outer side of the main shaft is connected with a polishing slice through a polishing slice tensioning mechanism. A bearing is arranged in the middle portion of the dust cover. The outer side of a dust suction opening is connected with a connection pipe through a corrugated pipe, and one end of the connection pipe is connected witha dust collector. The installation frame is arranged at the upper end of the shell, and the corrugated pipe penetrates the interior of the installation frame. The dust collector is internally providedwith filtering nets, and the lower ends of the filtering nets are provided with a dust collection box. The wall polishing machine is provided with the damping mechanisms, and the damping mechanisms can play a certain role in buffering in the using process of the device.