Multi-blade wall breaking cutter and wall breaking machine

The multi-blade wall breaking cutter comprises a driving rotating shaft and a crushing cutter fixed on the driving rotating shaft, the crushing cutter at least comprises a first blade, a second blade, a third blade and a fourth blade which are sequentially arranged on the driving rotating shaft in a penetrating mode from top to bottom, the first blade is provided with a first blade, and the second blade is provided with a second blade. The first blade is upwards inclined; the second blade is provided with a second blade, and the second blade is horizontally arranged; the third blade is provided with a third blade, the third blade comprises a first bent section and a second bent section connected to the first bent section, the first bent section is obliquely arranged downwards, and the second bent section is obliquely arranged upwards; the fourth blade is provided with a fourth blade, and the fourth blade is obliquely arranged downwards. According to the utility model, the multi-angle almost dead-corner-free c