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Ni 0.35 Zn 0.65 Fe 2 O 4 ferrite is prepared through combustion synthesis in the external electromagnetic field. The highest magnetic field strength for the experiment is 1.1 T. Reactions temperatures were monitored by infrared radiation thermometer, the synthesized ferrite prepared in different magnetic fields is analyzed by XRD, SEM, and VSM. The results indicate that the coercivity of ferrite gradually decrease with the increase of magnetization. When the magnetic field strength is 0.54 T, the saturation magnetization is improved up to 56.05 emu/g (42%) as compared to that of ferrite in zero magnetic field. Through SEM analysis of Ni 0.35 Zn 0.65 Fe 2 O 4 ferrite, homogeneous grains of the crystal are observed. With the increase of external magnetic field, the ferrite grain improved. This paper also systematically explores the effect of the electromagnetic field on ferrite by combustion synthesis.