Sand mill capable of preventing slurry from being blocked during discharging

The utility model discloses a slurry discharge anti-blocking sand mill, which comprises a sand mill which comprises a guide shaft, and is characterized in that a filter box is arranged at the end part of the guide shaft, an inner cavity is arranged in the filter box, the inner cavity is communicated with the guide shaft, the upper side, the lower side and the front side of the inner cavity are provided with penetrating grooves, and the penetrating grooves are communicated with the guide shaft. The left side and the right side of the inner cavity are provided with inner grooves, the penetrating grooves are communicated with the inner grooves and the inner cavity, the shielding plate and the sliding baffle are adjusted at the same time to slide, the overlapping degree of the shielding plate and the penetrating grooves can be adjusted, and the overlapping degree of the sliding baffle and the inner grooves can be adjusted; the inner groove and the penetrating groove can adjust the size of the zirconium balls bloc