The invention discloses a novel wall surface polisher. The novel wall surface polisher comprises a handheld shell, a motor, an air suction guard, a grinding wheel, an air suction pipe and an air suction device, wherein the motor is assembled in the handheld shell; the air suction guard is mounted at the front end of the handheld shell; an opening of the air suction guard is trumpet-shaped; an elastic ring is arranged on the edge of the opening; the center of the grinding wheel is fixed to a motor shaft of the motor; the grinding wheel is positioned on the front side of the air suction guard; aconnecting part is arranged on the back surface of the grinding wheel; a vane is arranged in the circumferential direction of the connecting part; a clearance is formed between the grinding wheel andthe opening of the air suction guard; the air suction pipe communicates with the air suction guard and is fixed to the handheld shell; and the air suction device communicates with the air suction pipe. According to the novel wall surface polisher, when the grinding wheel is utilized to polish a wall surface, the air suction device can effectively suck dust, strength of an air current can be effectively improved and the direction of the air current can be effectively changed through the vane, dust suction efficiency is improved, and the suction area can be increased as the opening of the air suction guard is trumpet-shaped.