In order to solve the corrosion problem of magnesium alloy workpiece in the machining process for short-term storage, the protective effect was compared between samples of the F35 anti-rust oil, KH69 and KH460 silane in the environmental conditions of 80 % humidity and 50 ℃ temperature. Results show that the magnesium alloy treated with KH69 silane tested for 15 days have no visible corrosion pitting, even under the microscope only minor corrosion pitting, whose anti-rust performance is equivalent to the anti-rust oil F35 , and the slight precipitation of KH69 silane has little effect of its anti-rust properties; The magnesium alloy treated with KH460 silane also have good performance, but less than the KH69 .