Water-resistant gypsum mortar smoothing device

The utility model provides a waterproof gypsum mortar smoothing device, which relates to the technical field of smoothing devices and comprises a mounting plate, a driving device mounted on the mounting plate, a smoothing component fixedly arranged at the movable end of the driving device, a water tank mounted on the mounting plate, and a rotating disc mounted on the smoothing component. The rotating disc and the smoothing assembly rotate synchronously, water outlet holes are evenly distributed in the bottom of the rotating disc, a water pipe is communicated between the rotating disc and the water tank, and a speed regulating valve is installed on the water pipe. The driving device drives the rotating and beating working disc and the grinding assembly to rotate, then the gypsum mortar is ground, when water on the gypsum mortar is little, grinding of the mortar is possibly affected, then water is injected into the rotating disc through the water tank, the water is scattered on the gypsum mortar through the wat