Abstract: The double stator permanent magnet vernier machine can reduce the main inductance of the armature while increasing the modulating magnetic field of the machine. Although it has the advantages of high torque density and high power factor, its serious flux leakage defect affects the popularization and application of this type of machine. In order to solve this problem, HTS bulks are introduced on the inner stator side, which can effectively reduce the magnetic flux leakage while improving the magnetic flux modulation effect. Firstly, the most important thing is to establish a 2-D machine model with 11 pairs of poles and 12 slots for finite element analysis to clarify the effect of the current lead angle on the load torque. Secondly, the main structural dimensions of the machine are optimized by parametric analysis, and the optimal size selection of HTS bulks are determined by comprehensively considering the process design. Then, the electromagnetic performance of the dual-stator permanent magnet vernier machine before and after optimization is compared and analyzed. The results show that by using the HTS bulks can not only efficiently improve the flux modulation effect of the vernier machine, but also greatly reduce the machine flux leakage.