Abstract: The article introduces present situation of flotation concentrate dewatering system and the existing problems in the Fangezhuang Coal Washing Plant. Aiming at these problems, to reform the original system. This paper briefly introduces the technical transformation process plan and its advantages, and illustrates the main equipment selection and process layout. Expected application effect is remarkable affter technical transformation for the system, not only can effectively improve the flotation concentrate dewatering effect and reduce the water content of the product, but also can achieve the effective recovery of fine-grained flotation concentrate, improve clean coal recovery rate and create economic benefits.