Abstract: For providing reliable foundation with the nine coal ascending mining, raw coal properties were analyzed, in the Qidong coal preparation plant. This article shows that the nine coal ascending mining is 1/3 coking coal, which is a scarce coal. And it is fragile, difficult to choose, prone to mud. The technological process in coal preparation plant was analyzed, the author suggested that the increase in coal flotation process and flotation tail coal pressure filtration recovery processes, on the premise of no major renovation. Qidong well annual output of raw coal reached 2.4 million tons at the end of 2014.Coal preparation plant increased the income of 271.008 million yuan, after reforming technique.