［Objective］Aiming at the urgent need for steel slag treatment and the high cost of mica iron oxide in epoxy coatings.［Methods］A composite epoxy anti-corrosion coating was preparedusing shield powder derived from steel slag and mica iron oxide as fillers. The chemical composition， phase structure，and particle size distribution of the fillers were characterized by X-ray fluorescence spectroscopy（XRF）X-ray diffraction（XRD），and laser particle size analysis（LPSA）. The microstructure of shieldpowderandcoa，tings was observed using scanning electron microscope（SEM）. Coating properties including pencil hardness，flexibility，adhesion，impact resistance，water absorption，and anti-corrosion performance were tested. The hydrophobicity and electrochemical corrosion behavior were tested usinga contact angle meter and an electrochemical workstation.［Results］ The shield powder with highhardness can provide support within the coating. Its particle size is smaller than that of mica iron oxide， which can effectively fill gaps to improve coating compactness，and prevent corrosive substances from invading the coatings，thereby enhancing the mechanical and anti-corrosion properties of coatings. When themass ratio of shield powder to mica iron oxide was 3∶1，the coatings exhibited best comprehensive performance：pencil hardness 5H，adhesion grade 0，flexibility 11 mm，impact resistance 28 cm，contact angle 83. 37°，7-day water absorption 0. 27%，impedance modulus 5. 79×10⁶ Ω ·cm²，corrosion potential -0. 11 V，corrosion current density 4. 39×10^-8 A/cm²，and equivalent circuit resistance 1. 27×10⁵ Ω ·cm².［Conclusion］ Epoxy anticorrosive coatings prepared by using an appropriateamount of shield powder synergistically with mica iron oxide as fillers had better comprehensiveperformance compared to coatings using mica iron oxide alone.