The invention relates to a nonlinear fuzzy language power distribution network node vulnerability evaluation method based on a complex network, and the method comprises the steps: constructing a powerdistribution network complex network model according to power distribution network data; determining importance measurement indexes of the power distribution network nodes, and constructing a networknode importance evaluation database; determining parameters of fuzzy rules in the complex network model of the power distribution network; performing data clustering analysis on the database by adopting a clustering method; establishing a nonlinear fuzzy language power distribution network node vulnerability evaluation model based on a complex network; carrying out parameter optimization; analyzing the node vulnerability of the power distribution network by adopting the optimized evaluation model; and maintaining the power distribution network node according to the analysis result. Analysis and accurate evaluation of the vulnerability of the power distribution network node are realized by adopting a nonlinear fuzzy language, so that the power distribution network node is maintained, the cascading failure risk is reduced, safe and stable operation of the power distribution network is ensured, the power utilization demand of a user is met, and the power utilization quality of the user and the economic benefit of a power grid enterprise are improved.