Abstract: Aimed at the main problems of independent operation of Yicheng Coal preparation Plant, with the help of the existing trusteeship operation mode, the washing problem of the plant is solved from two aspects of technology and management. After the trusteeship operation mode is realized, the ash content of cleaned coal on screen is reduced to 9.67%, the clean rate of gangue is reduced to 1%, the clean rate of medium coal is reduced to 5%, and the recovery rate is increased by about 3%. Referring to the design capacity of coal preparation plant of 240Mt/a, the raw coal can be increased by 72,000 t/a, the water content of cleaned coal is reduced by 3.68%, and the transportation cost is improved. The washing capacity of raw coal per hour increased to 380t/h, and the failure rate of equipment decreased from 2.5h to 0.5h, basically realizing the modern production of Yicheng Coal preparation Plant, thus verifying the feasibility of the managed operation mode of Yicheng Coal preparation Plant.