The invention discloses a station crossing device for a main machine body of a shield tunneling machine. The station crossing device for the main machine body of the shield tunneling machine aims to solve the problem that a shield tunneling machine is difficult to move horizontally under the ground condition of an underground tunnel. The station crossing device comprises a jacking assembly and a sliding assembly; the jacking assembly comprises a jacking device and a to-be-jacked object; the to-be-jacked object and the shield tunneling machine are fixed together; the sliding assembly comprisesa fixing frame, a steel sliding pad and a pushing device; the fixing frame and the shield machine are fixed together; a reverse force application supporting part with the pushing device is fixedly arranged at one end of the steel sliding pad; and the pushing device is used for pushing the fixing frame to slide on the steel sliding pad. The invention further discloses a station crossing method forthe main machine body of the shield tunneling machine in a non-lifting environment. The method further comprises the step of moving the shield tunneling machine horizontally between the step of mounting the station crossing device on the shield tunneling machine and the step of dismounting the station crossing device, specifically, the to-be-jacked object is jacked by adopting the jacking device,the steel sliding pad is placed right below the fixing frame, the fixing frame is enabled to fall onto the steel sliding pad, and the pushing device pushes the shield tunneling machine to slide. According to the station crossing device for the main machine body of the shield tunneling machine and the station crossing method for the main machine body of the shield tunneling machine in the non-lifting environment, the shield tunneling machine can be moved horizontally at a section with a complex ground condition of the tunnel.