Crusher for coal detection

The utility model provides a crusher for coal detection, which comprises a main shell, a crushing cavity, a crushing device, a crushing device, a crushing device, a crushing device and a control device, and is characterized in that the main shell is provided with a crushing cavity; the feeding part is connected with the main shell, and a cavity of the feeding part communicates with the crushing cavity; the crushing wheel is rotatably arranged in the crushing cavity, the rotating axis of the crushing wheel is horizontally arranged, the crushing wheel comprises a wheel disc and 5-7 crushing teeth distributed in the circumferential direction of the wheel disc, the two opposite planes of the wheel disc correspond to the two opposite side walls of the crushing cavity respectively, and the crushing teeth comprise short crushing columns and long crushing columns; the short crushing columns and the long crushing columns are located on two opposite planes of the wheel disc respectively, the length of the short crushin