In the field of shipping,low-speed direct-drive permanent magnet synchronous motors are gradually replacing traditional drive structures, avoiding the disadvantage of low efficiency of traditional transmission mechanisms. However, their large volume makes them inconvenient for transportation. Therefore, adopting a modular splicing method for the stator and rotor core structures can effectively improve the utilization rate of silicon steel sheet materials in the processing link and reduce material waste. In the split modular permanent magnet synchronous motor, due to the stator modularization, it is convenient for transportation. At present, most designs use concentrated windings. This paper uses a new winding arrangement and adopts a distributed winding for modular split design, making the stator more convenient for transportation. This paper designs a 240-slot 40-pole permanent magnet synchronous motor, carries out a series of analyses and designs combined with modularization, uses finite element software for modeling and simulation, and conducts multiple comparisons with traditional integrated motors, including electromagnetic characteristics, loss characteristics, etc. The analysis results have certain value for the design of modular motors.