The invention is suitable for the technical field of power grid planning, and provides a power grid fragile line evaluation method, terminal equipment and a storage medium. The method comprises the steps of obtaining the self power flow variation of all other lines caused by the fault of any one line in a power grid; constructing a correlation matrix according to the power flow variation; repeatedly iteratively calculating the authority value and the hub value of each line in the power grid according to the correlation matrix until the values meeting the iteration termination condition are theauthority value and the hub value of the power grid; and screening out a fragile line in the power grid according to the authority value and the hub value. According to the power grid fragile line evaluation method, the terminal equipment and the storage medium provided by the embodiment of the invention, since the power flow information in the actual power grid is fully considered, the situationthat an existing power grid fragile set identification algorithm only takes the topological characteristics of the power grid as a research object is avoided, and thus the identification accuracy ofthe power grid fragile set is improved.