The present invention provides a (N-1) verification method of a power grid comprising new energy, and relates to the field of electric power grid technology. The (N-1) verification method can reduce the computation workload of (N-1) verification of power grid comprising new energy and can improve the computation speed. The method comprises the steps of: establishing new-energy generation scenes; establishing one power grid line safety sensitivity scalar function PI for each new-energy generation scene; calculating one PI value of each line, and performing sorting of the lines according to a sequence of the PI values in descending order; and disconnecting a single line according to the sequence, and performing calculation of load shedding amount after disconnection until disconnection of acertain line cannot cause load shedding or until disconnection of M continuous lines cannot cause load shedding. The method provided by the invention is applied to (N-1) verification of power grid lines.