The invention discloses a corrosion resistant steel material and relates to the technical field of steel materials. The corrosion resistant steel material comprises the chemical components of, by mass, 0.26%-0.45% of C, 0.53%-0.62% of B, 4.46%-5.16% of Cr, 0.62%-0.74% of Al, 0.35%-0.43% of Zn, 0.41%-0.58% of Cu, 0.34%-0.49% of Ti, 0.16%-0.19% of Si, 0.12%-0.18% of W, 0.12%-0.14% of Nb, 0.18%-0.26%of Mn and the balance Fe and inevitable impurities. The invention further discloses a machining process of the corrosion resistance steel material. According to the machining process of the corrosionresistance steel material, the corrosion resistance performance of the steel material can be effectively improved, and accordingly the service life of the steel material is prolonged.