The invention relates to a control method of an AC-DC interconnected power grid short-circuit current limiter electromechanical transient model. The control method comprises the following steps: (1) construction of the short-circuit current limiter electromechanical transient model is completed; (2) the control method of the short-circuit current limiter electromechanical transient model comprises two kinds, one is an automatic control mode, and the other is a manual control mode; (3) as for the automatic control mode, an action criterion is composed of combining a short-circuit current threshold value If0 and a current change rate threshold value di/dt, that is, a thyristor in the short-circuit current limiter controls quit and input of a series capacitor according to the criterion; and as for the manual control mode, an action criterion is composed of combining the time Tstart when the thyristor breaks over or the capacitor quits, the time Tend when the thyristor is locked or the capacitor is inputted or the continuous breakover time Tm of the thyristor, that is, the thyristor in the short-circuit current limiter controls quit and input of the series capacitor by coordinating with a setting condition of anticipated faults in electromagnetic transient simulation and through setting the quit/input time or the duration time. The control method provided by the invention is clear in physical concepts, convenient in engineering realization and good in expansibility.