Wall breaking machine

The utility model provides a wall breaking machine which comprises a main machine and a cup body which are connected with each other, a motor is arranged in the main machine, and a tool apron is arranged at the bottom of the cup body; the cutter mechanism comprises a cutter assembly arranged in the cup body and a cutter shaft penetrating out of the cutter holder, the lower end of the cutter shaft is in transmission connection with an output shaft of the motor, and the cutter assembly is fixed to the upper end of the cutter shaft; the cutter assembly comprises an upper blade and a lower blade which are arranged in a crossed mode, the upper blade is located above the lower blade, the blades on the two sides of the upper blade are obliquely arranged upwards, and the upper surface and the lower surface are arc-shaped surfaces with spiral angles. According to the wall breaking machine provided by the invention, the blades on the two sides of the upper blade both adopt the cambered surface blades with the spiral an