Switched reluctance motor （SRM） has heralded considerable applications in electric vehicle drive systems， primarily due to its robust and simple construction， high starting torque， and broad speed range. Unlike asynchronous and synchronous motors that leverage the bipolar output of regulators for quadrant Ⅳ operation， traditional unipolar SRM speed loop control systems rely on external inputs to toggle operational quadrants， leading to challenges in ensuring smooth transition during such quadrant shifts. To address this issue， this paper introduces an integration of the SRM speed loop control system with its four-quadrant control approach. Based on the foundational theory of angle position control （APC）， this paper logically associates the bipolar output of speed regulators with motor speed direction to form a novel APC control parameter. When combined with traditional chopping current control （CCC）， it creates a new model for four-quadrant speed loop control systems. This system alleviates the jerkiness issues associated with frequent braking switches in SRMs， ensuring smooth transitions for electric vehicles during hill-climbing scenarios. Simulation and experimental results both affirm the feasibility of this system’s principle， and enhance the smoothness of quadrant transitions in electric vehicle SRM drive systems.