The present invention discloses a low frequency oscillation identification method for accessing of wind power to a power grid in the technical field of wind power integration monitoring. The low frequency oscillation identification method comprises the steps that the system-wide linearized state matrix of a power system without a winder turbine generator is corrected, and a corrected system-wide linearized state matrix is obtained; eigenvalues and eigenvectors of the corrected system-wide linearized state matrix are figured out; the frequency, attenuation damping ratio and electromechanical circuit correlation ratio of the eigenvalues are worked out according to the eigenvalues and eigenvectors; and the eigenvalues are analyzed according to the frequency, attenuation damping ratio and the electromechanical circuit correlation ratio of the eigenvalues, and the low frequency oscillation mode of the accessing of the wind power to the power grid is determined. The low frequency oscillation identification method for the accessing of the wind power to the power grid solves the problems that an existing low frequency oscillation identification method does not take large-scale wind power accessing into consideration and cannot identity the system-leaded oscillation mode automatically.