A kind of waterborne asphalt metal anti-corrosion coating with high anticorrosive performance has been prepared by using waterborne asphalt as main film-forming material and combined with proper acrylic emulsion and talc. Several influential factors on sagging property and film appearance including the type of the emulsified asphalt, the type and amount of the pigment, the mass ratio of acrylic emulsion and the filler and the choice of the rheology agent and defoaming agent, etc. are investigated. It is found that when the mass ratio of acrylic emulsion and talc is 1.2∶1, and the dosage of talc is 18% of the coating, wherein the wetting agent, dispersing agent and defoaming agent R are further mixed to prepare the pre-dispersed composition which shows the desirable viscosity and fineness. Then the emulsified asphalt A is mixed with pre-dispersed composition in addition to the film-forming agent, defoaming agent R, rheological agent E 0.2% and rheological agent F0.3% and other additives to prepare a kind of waterborne asphalt metal anticorrosive coating which shows good comprehensive performance.