Disclosed are Cu-Ti-Co high-corrosion-resistance stainless steel and processing and thermal treatment methods thereof. The Cu-Ti-Co high-corrosion-resistance stainless steel is prepared from the alloyelements of less than or equal to 0.08 of C, 11.0-15.0 of Ni, 18.0-20.0 of Cr, 3.0-4.0 of Mo, less than or equal to 0.32 of Ti, 0.2-0.8 of Cu, 0.1-0.5 of Co, less than or equal to 2.0 of Mn, less than or equal to 1.0 of Si, less than or equal to 0.035 of P, less than or equal to 0.030 of S, and the balance Fe, wherein Ti is greater than or equal to 3.98*(C-0.01) and smaller than or equal to 3.98*C. Titanium carbide (VC) is crushed and dispersed through thermal deformation cogging and cold deformation, and grains are coarsened by high-temperature solution treatment. The corrosion current density in an H2SO4 electrolyte with the molar concentration of 0.5 mol/L containing 5*10<-6>F minus at 80 DEG C under oxygen conditions is 1.08-3.01 [mu]A/cm<2>, and the corrosion current density is equivalent with that of a stainless steel bipolar plate material with a surface coating. The Cu-Ti-Co high-corrosion-resistance stainless steel has the characteristics of low hardness and high elongation,and is beneficial for forming of a bipolar plate runner.