Rain and sewage diversion road and construction method thereof

The rainwater and sewage diversion road comprises rainwater ports located on the two sides of the road and a drainage pipe located below the road, sedimentation tanks are arranged on the drainage pipe at intervals, inspection wells are arranged on the sedimentation tanks, a connecting piece is arranged at the top of the drainage pipe and located on the sedimentation tanks, and a sedimentation plate is connected to the connecting piece. Holes are formed in the settlement plate, and the plate surface projection surface of the settlement plate covers the longitudinal section of the drainage pipe, so that water flow in the drainage pipe penetrates through the settlement plate; a filter plate is connected in the sedimentation tank, a gap is formed between the filter plate and the bottom of the sedimentation tank, a matching pipe is connected to the bottom of the sedimentation tank, and the matching pipe is communicated to the water outlet to discharge water flow falling into the bottom of the sedimentation tank th