Abstract: The intergranular corrosion performance at pulse current crack arresting area of 304 stainless steel before and after sensitization was studied by oxalic acid electrolytic etching test and potentiostatic polarization test, and a method suitable for evaluating the intergranular corrosion performance at crack arresting area was determined. The results show that there was no carbide precipitated at grain boundaries in the solidification zone, fine-grained zone and deformed martensite zone at crack arresting area; after potentiostatic polarization, the passive film at grain boundaries was intact, indicating intergranular corrosion didn't occur at the crack arresting area. The corrosion occurred at grain boundaries of different areas at crack arresting area of the sensitized specimen, indicating that the oxalic acid electrolysis method failed to distinguish the difference in intergranular corrosion performance among different micro-zones after pulse crack arrest. After potentiostatic polarization test, the passivation films at grain boundaries in the solidification zone and fine-grained zone at crack arresting area of the sensitized specimen had better stability and a certain ability to resist intergranular corrosion. The severe intergranular corrosion occurred in the defermed martensite zone. The potentiostatic polarization method can be used to evaluate the intergranular corrosion performance at pulse current crack arresting area of austenitic stainless steels.