The magnetic properties mainly lie on the grain size, crystal texture and non-metallic inclusions in non-oriented electrical steels. Especially the inclusions, their exist will restrain grain growth, accelerate crystal lattice aberrance and block magnetic domain movement. Thus the inclusions in non-oriented electrical steels must be constrained vigorously. In this paper the distribution, variety, shape and size of inclusions and the magnetic properties were investigated under different deoxidation method in two typical non-oriented electrical steel grades. The results showed, there were distinct differences on variety, size, removal speed and magnetic properties under Si-Al and Al-Si deoxidation method, and the magnetic properties will be suffered more salient after the second annealing. The main variety of inclusions were FeO•SiO2, FeO•Al2O3, the complex of FeO•Al2O3 and MnS under Si-Al deoxidation method, and AlN, Al2O3, FeO•SiO2, FeO•Al2O3, the complex of FeO•Al2O3 and MnS, the complex of FeO•Al2O3 and AlN under Al-Si deoxidation method, separately.