Municipal sewage treatment system

The invention relates to the technical field of sewage treatment and discloses a municipal sewage treatment system which comprises a treatment pond, a filter plate arranged in the middle of the treatment pond and a protection plate connected to the upper end of the treatment pond, a water inlet pipe and a water outlet pipe are connected to the treatment pond, the water inlet pipe is located on the upper side of the filter plate, and the water outlet pipe is located on the lower side of the filter plate. The protection plate is rotationally arranged on the treatment pond, the side, close to the filter plate, of the protection plate is connected with a collection box, one side of the collection box is provided with a collection opening for garbage to enter, and the treatment pond is provided with a rotating mechanism for driving the protection plate to turn over and a pushing mechanism for pushing the garbage on the filter plate to the collection box; a lifting mechanism used for driving the collecting box to m