Abstract:Starting from a typical municipal road project in coastal city, this paper analyzed the design ideas and methods of municipal road drainage system in coastal region by point and surface system. Through a series of measures such as sponge city, storm water pipe, waterlogging drainage system, tide gate, drainage channel and so on, the urban drainage and waterlogging engineering system of "source emission reduction, pipe network discharge, storage and drainage at the same time, emergency response for exceeding standards" has been realized.