In response to the disadvantages of magnesium alloy corrosion resistance，based on the storage period and inter process corrosion issues of Mg-Gd-Y rare earth magnesium alloys，a silanization surface treatment technology is developed to improve the corrosion resistance of magnesium alloys.On the basis of traditional single silane films，composite silane films and dual-layer silane films composed of multiple silane composites are developed，and their film layer structures are explained.Electrochemical and immersion tests are conducted for corrosion resistance verification.The results show that compared with a single silane film，the self-corrosion current densities of the composite and dual-layer silane films are decreased by an order of magnitude.The corrosion time in the NaCl solution with a mass fraction of 3.5% increases from 24 h to 168 h.