Abstract: The variety, quantity, size and shape of inclusions in K452 superalloy and the distance between inclusions in the alloy would have a serious impact on their properties. In this paper, the inclusion in K452 alloy was separated by electrolysis. The non-metallic inclusions in superalloy were studied by SEM and XRD. Then the obtained inclusions were quantitatively analyzed. The results show that the main components of the inclusions are AlNi₃, Cr₂₃C₆, MnN₂, Al₂O₃, aluminum oxides and iron compounds. The mass percentage of inclusions in the alloy is 1.57%. The morphology of inclusions is flocculent, massive, spinel, cone, and so on. The size range of inclusions is from 5 μm to 200 μm. The presence of large size inclusions would significantly reduce the service life of parts.