In order to meet the development needs of local power,Vietnam plans to expand the coal-fired power plant and builds a new coal terminal and coal conveying system. In view of the design scheme for the drainage system of the new coal terminal provided by the foreign party,we carry out a comprehensive analysis from the technical and economic point of view,and point out the shortcomings of the drainage system designed by the foreign party. Combining with the common practice of the drainage system of the coal terminal in China,and based on the comparative analysis,we optimize the drainage system designed to meet the environmental protection requirements of “zero discharge” of rainwater and flushing wastewater in the terminal area.