The invention discloses an on-line static state safety evaluation method based on an anticipated fault set, belonging to electric power system safety analysis technology field. The on-line static state safety evaluation method adopts sensitivity of node active power injection to branch active power and sensitivity of node reactive power injection to node voltage and estimates a static safety evaluation result under a current operation state on the basis of an evaluation result of overload safety and static voltage safety evaluation result of a device under a previous anticipated fault and on the basis of changing amounts of the node active power injection and the node reactive power injection under the current operation state relative to an operation state corresponding to the previous static safety evaluation, targets an anticipated fault with a smaller device overload safety and static voltage safety margin estimation value to performs a static safety evaluation based on load flow calculation, and adopts a posterior correction method to perform correction on estimated parameters. The on-line static state safety evaluation method based on the anticipated fault set automatic screening can realize online static safety fast evaluation based on the anticipated fault set automatic screening.