The invention discloses a PSS model applicable to PSCAD electromagnetic transient simulation. A transfer function from PSASP to PSCAD is solved using an implicit trapezoidal integral method, a transfer function control block diagram is equivalently converted, the frequency domain form is converted into a time domain form, the initial value of each state variable is set to 0, and the state variables are initialized and iterated; and the corresponding relationship of the state variables from PSASP to PSCAD is determined, wherein the input signal represents the speed deviation, power deviation and terminal voltage deviation of a generator, and the output signal represents the excitation voltage regulation quantity.