Sewage treatment device for municipal underground pipeline construction

The invention relates to the technical field of pipeline construction, in particular to a sewage treatment device for municipal underground pipeline construction, which comprises a protective barrel, the protective barrel is in the shape of a round barrel, a row of diversion holes are formed in a barrel side shell, a rotating shaft is fixed outside the barrel bottom of the protective barrel, and a middle ring body is movably sleeved in the opening end of the protective barrel. A water outlet barrel is fixed to the side, back to the protection barrel, of the middle ring body, a supporting frame is fixed to one side of the middle ring body, a rotating shaft is supported by one end of the supporting frame, and in the water pumping process, the protection barrel continuously rotates, so that the blocking probability of the flow guide holes in the moving process can be reduced, and the rotation power source of the protection barrel comes from water flow impulsion; stable mechanical automatic transmission of part d