The invention discloses a power factor correction control system. The system comprises a power factor correction circuit and a control unit; the control unit executes the following steps: 1) representing an element parameter of the power factor correction circuit by adopting a nominal value and variable quantity, and establishing a current state spatial model of the power factor correction circuit; 2) operating a total-field sliding mode control TSMC algorithm, wherein the algorithm comprises two parts: acquiring expected performance according to a reference model and designing a constraint controller. The element parameter is represented by using the nominal value and the variable quantity so as to establish the current state spatial model, thereby improving the robustness on the parameter change by the controller. On the one hand, the TSMC algorithm can acquire the expected performance according to a nominal model, and on the other hand, the tracking error of the inductor current canbe always maintained on the sliding mode surface by designing the constraint controller, and the tracking error of the inductor current gradually tends to zero.