Abstract: Fe-Si/MnZn(Fe₂O₄)₂ core shell structure powder was prepared by ball milling, and Fe-Si/MnZn(Fe₂O₄)₂ soft magnetic composite was prepared by spark plasma sintering. The effects of sintering temperature (600—1 000 ℃) on the microstructure and magnetic properties of the composite were studied. The results show that Fe-Si/MnZn(Fe₂O₄)₂ composite after sintering at different temperatures was composed of Fe-Si alloy particles and MnZn(Fe₂O₄)₂ phase between the particles. When sintered at 600-700 ℃, the composite was densified by mechanical bonding, which belonged to undersintering. When sintered at 800-900 ℃, good metallurgical bonding was achieved, which belonged to complete sintering. When sintered at 1 000 ℃, the MnZn(Fe₂O₄)₂ ferrite layer between the particles was damaged, which belonged to oversintering. With increasing sintering temperature, the magnetic properties of the composite increased first and then decreased. The magnetic properties were the best at a sintering temperature of 900 ℃, and the saturation magnetization was the highest, 1 476 kA·m^-1, the coercive force was the lowest, 548.3 A·m^-1, the core loss was low, and the amplitude permeability was stable.