Doublestator permanent magnet synchronous generator (DSPMSG) had two stators and one inbetween rotor. It was not easy to carry out electromagnetic field calculation with common software. Magnetic circuit model for DSPMSG was established. The model considered magnetic saturation according to the magnetization characteristic curve of ferromagnetic material, and took into account the influence of armature reaction of inner and outer windings on permanent magnet field. It was convenient for the timely adjustment of design variables. The calculation results using the magnetic circuit model of a 3.3 kW prototype met with the results of finite element calculation, which indicated the practicability and validity of the model.