The utility model provides a spliced trolley for a prefabricated assembly-type subway station, and belongs to the technical field of rail traffic. The spliced trolley is characterized in that the spliced trolley is of a truss steel structure, a wheel-type walking device is installed on the base of the spliced trolley, the spliced trolley is totally divided into three layers of operation platforms from top to bottom, the three layers of operation platforms are combined and fixed, the first-layer operation platform and the second-layer operation platform are installed on a rail at the top of the third-layer operation platform, the base of the second-layer operation platform is provided with the wheel-type walking device, a sliding plate is arranged between the first-layer operation platform and the second-layer operation platform, the first-layer operation platform is provided with eight vertical hydraulic jacks, side walls of the four corners of the first-layer operation platform are fixed to the second-layer operation platform through four horizontal hydraulic jacks, and a side wall operation platform is fixedly connected with the side wall of the second-layer operation platform to form a whole and can move together with the second-layer operation platform simultaneously. The spliced trolley has the advantages that the spliced trolley is high in efficiency and mechanical degree, the spliced trolley integrates walking, transverse moving, jacking and arranging of the operation platforms, and factory operations of subway station construction can be effectively carried out.