Sand blasting equipment for interior of steel box girder

The invention discloses sand blasting equipment for the interior of a steel box girder. The sand blasting equipment comprises a base and a sand blasting device, a vertical through hole is formed in the base, a ventilation fan is installed in the vertical through hole, lighting lamps are installed on the periphery of the base, moving rollers are installed on the two opposite sides of the base correspondingly, and a locking plate is installed at the bottom of the base in a liftable mode; the liquid pump is used for being connected with a water source and mounted on the base; the liquid storage tank is installed on the base and connected to the liquid pump, the liquid storage tank is connected with a liquid discharging pipe, the liquid discharging pipe is erected on the base through a supporting frame, the supporting frame is arranged opposite to the liquid storage tank, and a spray head is rotatably installed at the end, away from the liquid storage tank, of the liquid discharging pipe; the ...