The invention relates to a hard anode oxidation process. The hard anode oxidation process comprises the following specific steps of A, hanging up; B, degreasing; C, first-time water washing; D, alkalietching; E, second-time water washing; F, acid etching; G, third-time water washing; H, ash removing; I, fourth-time water washing; J, first-time oxidizing; K, second-time oxidizing; L, fifth-time water washing; M, hole sealing with pure water; N, sixth-time water washing; O, seventh-time water washing; P, blow-dry; Q, hanging down; R, hot water washing; S, blow-dry with nitrogen; T, baking; andU, packaging. The process has the advantages of being simple and convenient and capable of effectively improving the corrosion resistance time.