High-strength intergranular-corrosion-resistant twinning induced plastic austenitic stainless steel comprises, in percentage by weight, the chemical components of <=0.02% of C, 1.00%-3.00% of Si, 22.00%-28.00% of Mn, <=0.015% of P, <=0.010% of S, 2.00%-4.00% of Ni, 16.00%-20.00% of Cr, 0.4%-0.8% of N and the balance of Fe and inevitable impurities. After solution treatment at the temperature of 1,050-1,150 DEG C, an obvious TWIP effect can be generated under cold deformation not less than 5%, the tensile strength is 850-950MPa, the yield strength is 450-550MPa, the ductility is greater than orequal to 50%, and sensitized intergranular corrosion cracks do not exist according to a GB / T4338 E method test. The stainless steel has the advantages that the problems of insufficient corrosion resistance of TWIP stainless steel and insufficient strength of common 300-series stainless steel are solved; and after solution treatment, high strength and high corrosion resistance can be obtained at the same time.