The embodiment of the invention relates to an unmanned street sweeper. The unmanned street sweeper comprises a chassis assembly, a frame assembly and a body assembly; the chassis assembly comprises achassis body, a front wheel, rear wheels, a wheel speed meter and a steering control system; the frame assembly comprises an equipment mounting frame assembly, a front frame assembly, a rear frame assembly and a top plate supporting assembly, wherein the equipment mounting frame assembly comprises an equipment mounting bracket and an equipment mounting plate; the front frame assembly comprises a front frame bracket, an LED screen bracket, a first GPS antenna bracket and a second GPS antenna bracket; the rear frame assembly comprises a rear frame bracket and a hinge bracket; the top plate supporting assembly comprises a top plate bracket and a locking device; the body assembly comprises a side wall assembly and a roof assembly; the front end of the side wall assembly is fixedly connected with the front frame assembly; the rear end of the side wall assembly is fixedly connected with the rear frame assembly and the equipment mounting frame assembly; and the roof assembly is fixedly connected with the top plate supporting assembly and buckled at the top end of the side wall assembly.