Abstract: The superconducting linear synchronous motor (SLSM) have the advantages of high thrust density and large air gap, which makes it the core power of high-speed maglev trains. However, due to curves, switchbacks, crosswinds and power harmonics, the magnetic levitation vehicle body undergoes multi-degree-of-freedom movements, which cause the motor secondary to rotate or shift, resulting in changes in the magnetic field distribution of the motor air gap and ultimately in the electromagnetic characteristics of the motor. In this paper, the effect of multi-degree-of-freedom motion on the motor secondary attitude is first analyzed. A finite element model for SLSM three-dimensional electromagnetic force calculation is established. Then, the validity of the model is verified by measuring forces of a superconducting synchronous linear motor prototype under multiple attitudes. Finally, the three-dimensional electromagnetic forces characteristics under the lateral offset, normal offset, roll, pitch, and yaw conditions are investigated. This paper provides a theoretical reference for the optimization of the operational performance of electric suspension trains.