The invention discloses a special crusher for a 3D print material. The special crusher comprises a conical roller, steel balls, liner plates, filter nets, a power device and bearing devices. The liner plates and the filter nets are arranged in the roller. One end of the roller is connected with the power device. The bearing devices are arranged at the two ends of the roller. A medium gear is arranged at one end of the roller. The outer side of the medium gear is provided with a big gear engaged with the medium gear. A power generator is arranged on the outer side of the roller. The power generator is used for using heat and noise generated during material crushing and grinding through a crusher body, and thus resources are fully used. A breaking device is arranged in the roller, the material is broken, and abrasion of parts such as the liner plates of the crusher is reduced.