The invention provides a method for acquiring parameters of an equivalent circuit model of a saturation reactor. The model comprises a non-linear inductor Lcore, an air core inductor Lair and a coil DC resistor Rcu which are in series connection. The non-linear inductor Lcore is in parallel connection with a non-linear resistor Re. The method comprises following steps: (1) calculating the non-linear inductance Lcore through a controlled current source equivalent method; (2) calculating the non-linear resistance Re through an impulse discharge test; and (3) calculating the air core inductance Lair through a linear inductance equivalent method. Compared with the prior art, the method for acquiring the parameters of the equivalent circuit model of the saturation reactor has advantages that the parameters of the equivalent circuit model of the saturation reactor are acquired based on the impulse discharge test, so that the electric performance of the saturation reactor can be more accurately simulated.