Abstract: By designing a multi-mode electromagnetic stirrer, this paper established a three-dimensional numerical model of the multi-mode magnetic field electromagnetic stirrer assisted with the finite element analysis software Ansoft Maxwell. At the same time, the electromagnetic field parameters of the experimental platform are measured by using the Gaussian meter. The comparison of the two models shows that the overall trend is consistent and the numerical deviation is small. It testified the accuracy of the numerical simulation model. The influence of excitation current intensity and frequency on the magnetic induction intensity and electromagnetic force distribution of rotating magnetic field, traveling wave magnetic field and spiral magnetic field are studied and analyzed by using the three-dimensional numerical model, so as to optimize the process parameters.