Anti-corrosion floor grinding machine

An anti-corrosion floor grinding machine comprises a box frame, supporting legs playing a supporting role are arranged at the bottom of the box frame, walking wheels are assembled at the lower ends of the supporting legs, a supporting frame is fixed to the bottom of the box frame, a vertically-arranged through hole is formed in the bottom of the supporting frame, and a vertically-arranged rotating shaft is slidably assembled in the through hole in a sleeved mode. A horizontally-arranged grinding disc is fixed to the bottom end of the rotating shaft, a lifting mechanism is arranged in the supporting frame, the upper end of the rotating shaft and the lifting mechanism are assembled, a rotating motor is assembled to the top end of the rotating shaft, a horn-shaped dust cover is arranged at the lower end of the supporting frame, and an annular main water pipe is fixed to the outer side of the dust cover. A water storage tank and a water pump are arranged in the box frame, the water inlet end of the water pump is