In recent years, the extreme weather takes place frequently and the urban waterlogging occurs frequently. In order to prevent the surrounding ground rainwater into the underground roads to cause a loss, the settings of drainage hump for the urban underground roads are getting more and more attention. Combined with the construction experience of underground road, the design essentials of drainage hump are analyzed, and the details to connect the surroundings after the settings of drainage hump are summarized. At the same time, if the layout of vertical section is limited, and the elevation of hump is hard to meet the requirements, the other measures should be considered for the drainage of underground roads in order to maximize the function of the underground roads.