Sewage treatment device for municipal engineering

The utility model relates to the technical field of municipal engineering, in particular to a sewage treatment device for municipal engineering, which comprises a crushing box, a filter box and a sterilization box, the filter box comprises a settling chamber, an extrusion chamber and a fine filtration chamber, the settling chamber is provided with a first filter plate communicated with the crushing box, and the crushing box is externally connected with a sewage input pipe; the settling chamber is provided with a drainage port and a first drainage valve; the extrusion chamber is arranged below a water outlet of the settling chamber, a first extrusion plate and a second extrusion plate which are oppositely arranged are movably connected into the extrusion chamber, a cavity can be formed between the extrusion chamber and the first extrusion plate, a telescopic cylinder is connected through a telescopic rod, and crushing sheets are arranged on the first extrusion plate and the second extrusion plate; the lower en