Rainwater overflow well

The utility model discloses a rainwater overflow well which comprises a vertical pipe, a top cover and at least one extension pipe, the vertical pipe is further connected with at least one drainage pipe and at least one water seepage pipe, the bottom of the vertical pipe is closed, the extension pipe is located between the vertical pipe and the top cover, the bottom of the extension pipe at the lowest position is provided with the vertical pipe, and the top cover is connected with the top cover. And the top cover is mounted at the top of the uppermost extension pipe. The rainwater overflow well is convenient to install and can be applied to construction of sponge cities, the parts such as the vertical pipes, the extension pipes and the top cover can be produced in a standardized and large-batch mode, applicability is wide, the number of the extension pipes can be automatically matched according to different construction depths, and therefore the rainwater overflow well is suitable for different depths. 本实用新型公