Abstract: To address the issue of excessive temperature rise in the windings of dual-axis linear motor modules after prolonged operation, the impact of the water-cooling plate’s conduit cross-sectional shape on cooling performance is studied in this paper. Through formula derivation and calculation, the equivalent thermal conductivity, specific heat capacity and density of the windings, as well as the convective heat transfer coefficient of the rotor surface, are obtained. By establishing a finite element model and performing electromagnetic-thermal field coupling calculations, the highest steady-state temperature of the windings is found to be 105.66 ℃, and the lowest steady-state temperature is 74.524 ℃. After installing water-cooling plates with conduit cross-sectional shapes of circular, square, rectangular and equilateral triangular, the highest winding temperatures obtained from electromagnetic-fluid field coupling calculations are 43.328 ℃, 43.833 ℃, 43.951 ℃ and 43.216 ℃ respectively. Among these, the temperature rise curves for the circular and equilateral triangular conduits are similar, as are those for the square and rectangular conduits. Introducing a comprehensive heat transfer performance index as an evaluation metric, and using the heat transfer efficiency and flow resistance of the circular conduit water-cooling plate as a baseline, it is found that the comprehensive heat transfer performance indices for the other conduit shapes are less than 1. Therefore, based on the highest temperature, the equilateral triangular conduit water-cooling plate demonstrates the best cooling effect, while the circular conduit water-cooling plate shows the best overall heat transfer performance.