The invention discloses an anti-corrosive outer casing of an electric pump. The outer casing of the electric pump is coated with an anti-corrosive protecting layer; the anti-corrosive protecting layeris formed by compounding a component A and a component B according to a ratio of 1:3; the component A is prepared from the following components of 8 to 11 parts of poly(aryl ether sulfone ketone) modified resin, 22 to 29 parts of silicon carbide micropowder, 10 to 15 parts of fluorinated graphite, 21 to 24 parts of black silicon carbide, 18 to 24 parts of benzoyl peroxide, 20 to 25 parts of aminoresin, 5 to 9 parts of neopentyl glycol, 11 to 19 parts of sodium pyrophosphate, 13 to 19 parts of base emulsion, 12 to 18 parts of anti-freezing agent, 22 to 28 parts of filler, and 34 to 36 parts of auxiliary materials; the component B is prepared from the following components of 8 to 13 parts of talcum powder, 8 to 14 parts of bisphenol F type liquid epoxy resin, 13 to 19 parts of calcium chloride, 3 to 9 parts of quartz, 15 to 20 parts of butyl acetate, 2 to 9 parts of 2-butanone cyclohexanone, 16 to 22 parts of plasticizing resin, 13 to 19 parts of fused corrosion inhibitor, 20 to 22 parts of curing agent, 21 to 25 parts of defoamer, 12 to 19 parts of auxiliary material, and 20 to 22 parts of solvent.