Axial field permanent magnet memory motor (AFPMMM) is a new type of motor. The accurate calculation of iron loss is of great significance to the performance analysis of the motor. In order to obtain accurate AFPMMM iron loss, firstly, the core multi ring delamination model is established and the magnetic field at the typical location of the core is analyzed. Secondly, based on the classical loss separation model, the column coordinate system is introduced to decompose the magnetic density to build the iron loss calculation model. This model not only considers the influence of higher harmonics, but also improves the iron loss calculation accuracy through the hysteresis loss correction coefficient and eddy current correction function. Finally, the prototype is tested, and the results of the improved model and several calculation methods are compared with the measured values. The research results show that the calculation accuracy of the improved iron loss model at each speed is significantly improved, with an average deviation of 3.45% compared to the experimental results, which is closer to the measured value.