The invention discloses a refractory material wet blank crushing device. The device comprises a feeding pipe, a stranding cage conveying belt, a conveying motor, a machine case, blades and a screen plate, wherein a feeding pipe is arranged at the position, close to the lower end, of the stranding cage conveying belt, and a motor support is arranged at the position, close to the upper end, of the stranding cage conveying belt; the motor support is provided with the conveying motor, the lower portion of the motor support is provided with a material conveying pipe, and a machine box is arranged below the material conveying pipe; a crushing motor is arranged on the machine box, and screen plate motor supports are arranged on the two sides of the machine box; screen plate motors are arranged onthe screen plate motor supports, a rotating shaft is arranged below the crushing motor, and the blades are arranged on the rotating shaft; and the screen plate is arranged at the lower parts of the blades, and a filter hole is formed in the sceen plate, wherein a discharging pipe is arranged at the bottom of the machine box. The crushing device has the beneficial effects that the crushing efficiency of the wet blank is improved through twice crushing of the stranding cage conveying belt and the crushing blades, manpower is reduced, an ideal crushing effect can be achieved, and meanwhile the production cost is reduced.