In the realm of power electronic converters, challenges arise in terms of weakened system damping capability under constant power loads (CPL) and increased system complexity under multiple constraints. To address these issues, a constrained sliding mode control strategy, which involves the reconstruction of the mathematical model of the Boost converter through the incorporation of a nonlinear function, is proposed in this study. By integrating the design of sliding mode control, a controller is achieved that effectively satisfies the full-state constraints. In the control parameters, a small signal analysis method is designed and used. The designed controller is implemented using pulse modulation technique to regulate the on/off operation of the switching tubes in the Boost converter. The effectiveness and feasibility of the proposed method is verified via simulations.