Abstract: In order to provide reference for the water supply and drainage design of the ground buildings of the mine and the coal cleaning plant, combined with the <code for design of water supply and drainage of the coal industry>, <code for design of the coal industry mine>, <code for design of the coal cleaning engineering> combined with the actual production and design of mines and coal cleaning engineering plants, the understanding of the specific provisions of the above code and the specific application in the field of coal industry are discussed. In view of the conflict and incompleteness in the code, the paper analyzes its application and rationality in the field of coal industry, clarifies the opinions and suggestions, and puts forward the contents that need to be revised and supplemented. To provide reference for the designers of water supply and drainage in coal industry.