Abstract:The differencees in the waterproofing design of sewage tank in General Code for Waterproofing of Building and Municipal Engineering(GB 55030—2022)and Technical Code for Waterproofing of Underground Engineering (GB 50108—2008) are compared. The waterproofing requirements of the new code for the municipal sewage tank are analyzed. The painting sequence of anticorrosion and waterproof coating of sewage tank is discussed. The common anticorrosion waterproof coatings of sewage tank are listed. Taking a wastewater treatment plant as an example, the common anticorrosion waterproof methods of municipal sewage tanks are explained. The technical problems in the standard implementation process are discussed.