The invention discloses a parameter setting method for a leading phase adaptive type power system stabilizer. In current projects, the conventional PSS (power system stabilizer) parameter setting method mostly adopts a phase correction method by taking an active power input ring as a compensation hysteresis characteristic principle. According to the parameter setting method disclosed by the invention, a leading phase adaptive type power system stabilizer model is adopted, and a corresponding relation between an input rotary speed signal and an active power signal is found by adopting a field test method, and by adopting a classical frequency domain calculation method, a leading phase angle calculation formula of a power-rotary speed axis synthesized vector is obtained; and the corresponding parameters can be set according to non-compensation characteristic of an actual unit through the phase angle calculation of the synthesized vector to enable a synthesized moment to be close to the rotary speed axis. The parameter setting method disclosed by the invention can be used for strengthening oscillation suppression capability of a frequently occurring low-frequency band of a super-huge type alternating current synchronous power grid, and the dynamic stability level of the low-frequency band of the super-huge type alternating current synchronous power grid is improved.