In response to the issues of complex manufacturing and hard maintenance caused by the large volume flat-|type permanent magnet linear motor in the low speed and large thrust linear drive field, a polygon combined permanent magnet linear synchronous motor (PCPMLSM) is described. PCPMLSM laminated along the circumferential direction eliminates eddy current effect. A 20-pole 24-slot PCPMLSM is analyzed by the 3D finite element method (FEM). Aiming at the problems of limited location accuracy and deterioration of thrust characteristics caused by the end force of the motor with this structure, the non-periodic variation rule of single end force caused by asymmetry of the end flux is studied. This phenomenon is weakened by using the mean value of the single end forces when the number of magnetic poles connected with the primary core is odd and even. On this basis, the method of reducing the end force by combining the optimization of the primary core length and the unequal width dislocation of the end teeth on each side is proposed. Finally, the effectiveness of the proposed strategy is verified by FEM.