In consideration of the distinctive temperature field distribution of the back-to-back Ω stator transverse flux permanent magnet linear motor (BBΩ-TFPMLM), a "magneto-thermal coupling method" was employed to conduct in-depth research in this paper. Firstly, the finite element method (FEM) is used to model, analyze and optimize the BBΩ-TFPMLM structure, and determine the electromagnetic parameters in stable operation. At the same time, the magneto-thermal coupling model is built through Workbench and the real time monitoring temperature rise law of the loss model is obtained. Ultimately ,the temperature rises of the stator core and the rotor core under rated current are 29.21℃ and 11.12℃, each temperature rise is within the reasonable range. The thermal imager measurements of the temperature distribution at 750s are consistent with the simulation results, verifying the correctness of the proposed theory.