The invention relates to the technical field of power system analysis and in particular relates to an inverter disturbance type island detection method based on combination of voltage frequency and measured impedance. The method is characterized by comprising the following steps: firstly analyzing island after-frequency reactive relation; controlling setting frequency-reactive feedback method inverters, and adding a feedback coefficient; if the sum of reactive power output by each inverter is not equal to zero, detecting whether an island operation state occurs or not according to the condition that whether the voltage frequency of a gird-connected inverter exceeds the limit of normal operation or not; otherwise, intensively injecting a voltage source signal at the point of common coupling of a system, wherein the signal is a single frequency signal, and the injection mode is three-phase injection; and detecting whether the island operation state occurs or not through the characteristic difference of system measurement impedance at the point of common coupling of the system. The island detection method provided by the invention can avoid failure caused by mutual interference of multiple disturbance signals in multi-inverter system scenes, and has the advantages of relatively high reliability, relatively high detection speed and simple and effective principle.