The permanent magnet spherical motor adopts different permanent magnet structure parameters to have certain influence on the electromagnetic field of the motor. This paper proposes a new type of double stator permanent magnet spherical motor, establishes different permanent magnet parameters of the motor model, and compares and analyzes the permanent magnets with different parameters. The effect of the structure on the electromagnetic field of the motor. The three-dimensional finite element method(FEM) is used to model the internal and external magnetic fields of the motor, and the radial component distribution data of the air gap flux density is obtained. At the same time, the static magnetic field flux density and magnetic field distribution are calculated for the structural parameters of the permanent magnet. The finite element solution model of the permanent magnet magnetic field in the spherical coordinate system is established and compared. Theoretical analysis and experimental results show the effectiveness of the designed structure, and the magnetic flux density of the rotor permanent magnet is tested, which is consistent with the simulation results.