Key infrastructure network elasticity detection method and system

The invention relates to a key infrastructure network elasticity detection method and system. The method comprises the following steps: applying disturbance to a key infrastructure network, and triggering a cascade failure process; acquiring network parameters of the key infrastructure network in the monitoring time period before and after disturbance; determining the connectivity of the key infrastructure network at each moment in the monitoring time period under the ideal fault-free condition and the actual state based on the network connectivity performance indexes and the network parameters; determining a network load capacity margin at each moment in the monitoring time period under an ideal fault-free condition and an actual state; and determining the elasticity of the key infrastructure network according to the connectivity of the key infrastructure network at each moment in the monitoring time period under the ideal fault-free condition/the actual state and the network load capacity margin of the key