The invention discloses a crusher for washing limonite ore. The crusher comprises a box body, wherein an eccentric cylinder is arranged in the box body, a second gear is connected to the outer wall ofthe eccentric cylinder in a sleeving mode, a shaft sleeve is installed on the left side of the box body, a rotating shaft is arranged on the inner wall of the shaft sleeve, a first gear is arranged at the right end of the rotating shaft, a first motor is arranged at the left end of the rotating shaft, the first motor is connected with the rotating shaft, a first power source is electrically connected with an external power supply, and a material containing box is arranged at the top of the shaft sleeve. According to the crusher for washing the limonite ore, through cooperation among the firstmotor, the rotating shaft, the first gear and the second gear, under the action of a movable jaw plate and a static jaw plate, the first motor is an alternating current servo motor, the rotating speed of the motor can be adjusted by adjusting the magnitude of the power generated by the current through the motor, the crushing efficiency of the movable jaw plate and the static jaw plate is improved, the yield is further improved, and the crusher is suitable for popularization and use.