The invention provides a doubly-fed induction motor three-phase unbalance steady-state model construction method and device and a doubly-fed induction motor three-phase unbalance steady-state model simulation method and device. The construction method comprises the steps that Laplace transform is conducted on a stator side equation and a rotor side equation of a d-q dynamic model of an induction motor; a stator d-q axis voltage equation obtained after Laplace transform is synthesized to obtain a stator voltage space vector expression, a rotor d-q axis voltage equation obtained after Laplace transform is synthesized to obtain a rotor voltage space vector expression, and derivation is conducted to obtain the positive sequence impedance and the negative sequence impedance of the inductor motor; the rotor side converter positive sequence impedance, the rotor side converter negative sequence impedance, the grid-connected side converter positive sequence impedance and the grid-connected sideconverter negative sequence impedance are established, and computing is conducted to obtain the doubly-fed induction motor positive sequence impedance and the doubly-fed induction motor negative sequence impedance; and a doubly-fed induction motor three-phase unbalance steady-state model is built according to the doubly-fed induction motor positive sequence impedance and the double-fed inductionmotor negative sequence impedance. Accordingly, the electromagnetic transient simulation speed can be increased.