Abstract: With the increasing proportion of new energy such as wind power and power electronic equipment, the dynamic characteristics of system become more complex, which leads to the risk of subsynchronous oscillation and the difficulty of locating oscillation propagation path. Therefore, a frequency domain location method of subsynchronous oscillation propagation path in wind power integrated system was proposed in this paper. Firstly, the dynamic model of permanent magnet synchronous generator（PMSG） was established and permanent magnet synchronous machine and its drive system, converter and its control system at machine side and grid side were included. Then, the state space model of the wind power integrated system was established, and the model of multi-input and multi-output transfer function was derived. Thus, the quantitative method of oscillation propagation intensity of each node of system was proposed, and the propagation characteristics of subsynchronous oscillation were quantitatively analyzed from the perspective of frequency domain. Finally, the effectiveness of the proposed frequency domain analysis method for oscillation propagation path location was verified with the 4-machine 2-zone system and 10-machine 39-bus system integrated with 2 PMSGs as example.