In recent years, with the increasing number of crushing stations and the continuous improvement of production, higher requirements are put forward for mineral sizers cleaning system and daily production. When there is more material inside or when there is a larger material inside, the motor will have a blocking and stopping phenomenon. The traditional cleaning system is: manually reverse or change the phase sequence of the power supply to achieve reverse to clean the material under the equipment, so that the operation is a waste of manpower and time, directly affecting the normal operation of the equipment, and the production efficiency is seriously reduced. The technical problems to be solved are: A cleaning system of crusher is provided to solve the problem of blocking, manually reversing or changing the phase sequence cleaning of the power supply, to achieve the purpose of mineral sizers motor automatic reversing cleaning, after the cleaning is completed, the motor can return to normal operation, saving manpower, and winning valuable time for production, so that the production line increases. The technical solution adopted to solve the technical problem is: a cleaning system, which includes a locked-in monitoring instrument, a button, a first intermediate relay, a second intermediate relay, a first AC cont actor, a positive indicator light, a reverse indicator light, a second AC cont actor, a motor integrated protector, a locked-in monitoring sensor, a motor and a tooth roll; The gear roller of the device is connected with the rotation monitoring sensor, the rotation monitoring sensor is connected with the rotation monitoring instrument, the rotation monitoring instrument is connected with the second intermediate relay, the second intermediate relay is connected with the second AC cont actor, the second AC cont actor is connected with the reverse indicator light and the motor integrated protector, the motor integrated protector is connected with the motor, the motor is connected with the tooth roller; The button is connected with the first intermediate relay, and the first intermediate relay is connected with the first AC cont actor, and the first AC cont actor is connected with the motor integrated protector and the positive turn indicator light respectively. The working principle is as follows: The locked-up monitoring sensor is used to monitor the operating status of the mineral sizers, and timely feedback the operating status of the crushing equipment to the locked-up monitoring instrument. When the equipment is blocked, the lock-up monitoring sensor will feed the monitored mineral sizers to the lock-up monitoring instrument. The relay coil inside the lock-up monitoring instrument is closed and maintained, and an active signal is output to the coil of the second intermediate relay. The second intermediate relay outputs a reverse signal to the coil of the second AC contact or, and the second AC cont actor is electrically maintained, so that the motor of the equipment can obtain electricity to reverse the automatic cleaning. When the cleaning is completed, the equipment can be restored to the positive running state through the operation button. The problem of manually reversing or changing the phase sequence cleaning of the power supply when the mineral sizers are blocked is fundamentally solved. The purpose of automatically reversing the cleaning of the mineral sizers motor is achieved. After the cleaning is completed, the motor of the equipment can be restored to normal operation, which saves manpower and gains valuable time for production.