Municipal rainwater drainage system

The utility model relates to a municipal rainwater drainage system. The system comprises a vertically-arranged rainwater well and a drainage pipeline connected to the lower end of the rainwater well.The drainage pipeline is connected with the sewage disposal mechanism; an inspection well cover is arranged at the upper end of the rainwater well; the upper surface of the inspection well cover is flush with the ground; an auxiliary flow guide mechanism is arranged on the ground; the auxiliary flow guide mechanism comprises an annular groove which is formed in the ground and takes the axis of therainwater well as an axis; annular mounting plates with L-shaped longitudinal sections are fixed to the inner walls of the two sides of the annular groove correspondingly. A flow guide pipeline communicated with the rainwater well is arranged in the annular groove, the flow guide pipeline inclines downwards from one end of the annular groove to the rainwater well, an annular supporting plate moving in the vertical directi