TR-888A low resistance conductive coating of magnesium alloy agent for all kinds of magnesium and magnesium alloy, the anti-corrosion coating used. It is suitable for AZ91D, AZ31B, AZ612, AM50, AZ80-T5, Z31-H24, ZM21, ZK60A, HK31, AM30B and other magnesium alloy die-casting, extruded profiles, plates, pipes. For the mobile phone shell, computer support, automotive steering wheel and cylinder and other magnesium alloy parts, the pretreatment process and the final process of anti-corrosion treatment (neutral salt spray can reach 48 hours, 8 level). Coating layer of fine crystalline, neat, film thickness up to 1-8µm; the film weight can reach at least 5-10.5g/㎡; the pores of the membrane can be controlled in 0.2-0.6%; low resistance, resistance controlled at 0.2 ohms within. The workpiece by coating the surface of the substrate, and the adhesion of the paint is greatly enhanced, thereby reducing the requirements on the selection of paint. The coating agent has excellent performance in the counterparts of similar products.