The invention provides a super-austenitic stainless steel high-temperature homogenization processing method, and aims to improve the uniformity and the high-temperature thermoplasticity of the component and the organization of a cast ingot or cast blank and control the size of crystal grains. The super-austenitic stainless steel high-temperature homogenization processing method is suitable for processing a target grade of steel, wherein the steel comprises, by weight, smaller than or equal to 0.02% of C, smaller than or equal to 4.00% of Mn, 19.5%-25.0% of Cr, 17.5%-23.0% of Ni, 6.0%-8.0% of Mo, 0.18%-0.55% of N, 0.30%-1.00% of Cu, smaller than or equal to 0.80% of Si, smaller than or equal to 0.030% of P, smaller than or equal to 0.01% of S and the balance Fe. The super-austenitic stainless steel high-temperature homogenization processing method is characterized by comprising the steps that the surface of the cast ingot or cast blank is brused with a high-temperature oxidation resistant coating; and the cast ingot or cast blank is put into a heating furnace, heating is conducted at the speed lower than 160 DEG C/h to enable the temperature to the range from 1240 DEG C to 1280 DEG C, the temperature is kept for 16-24 hours, and then hot working is directly conducted, or furnace cooling is conducted to enable the temperature to be 1000 DEG C, and the cast ingot or cast blank is discharged from the heating furnace and cooled in an air-cooling mode. The super-austenitic stainless steel high-temperature homogenization processing method is convenient to use, and reasonable and efficient, obviously eliminates element segregation and dendritic structures of the cast ingot or cast blank, achieves full re-dissolution of the Sigma phase and controls the size of the crystal grains, and therefore the hot-working performance is remarkably improved, and the technical guarantee is provided for acquisition of super-austenitic stainless steel products with high surface quality and excellent performance.