The invention discloses a municipal sludge drying treatment device. According to the technical scheme, the municipal sludge drying treatment device is characterized by comprising a drying shell; a feeding hole, a discharging hole and an exhaust outlet are formed in the drying shell; a screw rod is rotatably connected to the inside of the drying shell; the screw rod which is a hollow rod is connected with a driving part; a plurality of air outlets are formed in the circumferential direction of a rod part of the screw rod; the air outlets communicate with the inside of the screw rod; and one endof the screw rod is connected with an air inlet pipe. By using the municipal sludge drying treatment device, the problem that an existing sludge drying device is low in drying efficiency due to sludge heating nonuniformity in the drying shell, caused by distribution nonuniformity of heating devices, is solved.