The invention provides a refractory material grinding device, and relates to the technical field of refractory material production equipment. The refractory material grinding device comprises a grinding chamber, a grinding machine, a feeding pipe, a fan, a sprayer, a dust hood, a dust remover, a dust outlet, an air outlet pipe, a draught fan, an air return pipe, a base, a screening plate, a storage hopper, a discharging pipe, a vibrating motor, a connecting shaft, a collecting hopper, telescopic rods and springs; the grinding machine is fixed inside the grinding chamber, and the grinding machine is provided with the feeding pipe in a communicating mode; and the screening plate is arranged right below the discharging end of the grinding machine, a plurality of screen holes are uniformly formed in the screening plate, and the screening plate is obliquely arranged rightwards and downwards. According to the grinding device, the screening plate is arranged, so that after a refractory material is ground into powder in the grinding machine, the screening plate can be used for screening the powdery refractory material, then the wear-resistant material with the suitable particle size is screened out, subsequent screening again is not needed, and the production steps are simplified; and the telescopic rods and the springs are coordinated mutually, so that a certain buffering and dampingeffect is achieved on the grinding chamber.