Abstract: Following an introduction to China’s reserves of coking coal resources and the present status of the technological processes for preparation of such coal,the paper presents an in-depth analysis of the primary processes applied in coking coal main-stream washing processes,as well as the coarse slime separation processes and fine coal flotation processes.The criteria for the design of coking coal washing processes are proposed.At the end of the paper,the author elaborates on the developing trend of coking coal washing technologies.