Wall grooving machine of the utility model belongs to the class of electric tools, Shandong Jiaxin machinery in the production of a wall grooving machine, composed of a body, a motor, a motor casing, a gear box, a bracket, a switch box, a knife cover, gear, an output shaft, cutter, a handle combination, characterized in: output shaft and the fuselage at the end of the plane formed less than one.