To address the issues of high battery heating energy consumption and limited driving range during electric-only operation of hybrid electric vehicles in low-temperature winter environments, a multi-mode heating control strategy based on motor waste heat recovery is proposed. Performance tests on key air-conditioning system components were first conducted using an enthalpy difference test bench to obtain pressure and heat exchange data at different rotational speeds. Based on the experimental data, a one-dimensional vehicle thermal management system model integrating the engine, motor, battery, and air-conditioning circuit was developed through AMESim software. Multi-condition simulations under the New European Driving Cycle (NEDC) and Urban Dynamometer Driving Schedule (UDDS) were performed to analyze the effect of the motor outlet coolant temperature on waste heat recovery performance. The optimal activation temperature for motor waste heat recovery was determined to be 35?°C. Results demonstrate that the proposed strategy can effectively utilize motor waste heat to assist Positive Temperature Coefficient (PTC) heating of the battery. After two hours of operation at ?20?°C, the system energy consumption decreases significantly. Compared with conventional heating methods, the overall vehicle energy consumption is reduced by 3.7% to 4.0%, verifying the feasibility and effectiveness of the strategy in improving energy efficiency and extending driving range.