Dredging and separating device for municipal construction road sewage treatment

A desilting and separating device for municipal construction road sewage treatment comprises a water pump fixed to an automobile, a tool box and a sewage treatment box. According to the desilting and separating device for municipal construction road sewage treatment, a precipitant is added into road sewage through the chemical adding mechanism before the road sewage enters the solid-liquid separating tank, and after the road sewage added with the precipitant enters the solid-liquid separating tank, separated solid substances are pushed to the slag discharging opening through the spiral blades; separated liquid water is filtered by a filter screen of a drainage channel and then falls into a treatment tank, so that dredging and solid-liquid separation of road sewage are realized; in the backward flowing process of the sewage entering the treatment tank, a worker can use the sewage treatment mechanism to add a demulsifier, a defoaming agent, a PH regulator, a redox agent or a disinfectant into the treatment tank