Abstract: In this work, a modified stöber method was conducted to fabricate uniform and thin SiO₂ insulation layer with high resistivity on FeSiCr magnetic particles.The effects of SiO₂ insulating layer and compacting pressure on the magnetic and electrical properties of FeSiCr soft magnetic composites (SMCs) were studied.The introduction of SiO₂ layer was found to optimize the volume resistivity of FeSiCr SMCs.After insulation, the high-frequency eddy current loss is greatly reduced.This reduces core loss to 30%of uninsulated FeSiCr SMCs.Moreover, enhancing compacting pressure contributes to decreasing the width of air gaps among magnetic particles and improving SMC's density.As a result, higher permeability and lower hysteresis loss can be obtained.In addition, loss separation has shown that there is competition between hysteresis loss and eddy current loss.The satisfying permeability of 62.6 (1000 kHz) and relatively lowest core loss of 615 mW·cm^-3(25 mT@1000 kHz) could be achieved at the compacting pressure of 2170 MPa.