Abstract: Passive residual heat removal system is very important for faster reactors to ensure its safety.Bursting disk is one passive discharging device under over-pressure.Action performance of the bursting disk is carried out by adding fatigue loads repeatedly in this paper.The load stress is 80% of the nominal bursting pressure of the bursting disk,and the load cycles is over 10⁵.The experimental result shows that the action pressure difference before and after the fatigue experiment of the bursting disk is less than 1.5%,which indicates that the fatigue resistance of the bursting disk for the passive residual heat removal system is excellent,and it can ensure the reliable work of the passive system.