<p>Brushless DC (BLDC) motors are widely employed in high-performance applications such as aerospace, electric vehicles, and industrial automation owing to their high efficiency and excellent speed regulation capabilities. However, traditional control methods such as PID struggle to achieve high-precision control under parameter variations and external disturbances due to the inherent nonlinearity and strong coupling of BLDC systems. Although sliding mode control (SMC) improves robustness, conventional approaches suffer from slow convergence, chattering, and singularity issues, which limit the control accuracy and dynamic performance. To address these challenges, this paper proposes an improved non-singular fast terminal sliding mode control (INFTSMC) strategy combined with load disturbance compensation. First, a non-singular fast terminal sliding surface is designed to ensure finite-time convergence while avoiding singularities. Second, a gain adaptive reaching law (ARL) is introduced to dynamically adjust the control gains based on tracking errors, effectively suppressing chattering while accelerating convergence. Furthermore, a non-singular fast terminal sliding mode disturbance observer (NFTSMDO) is designed to estimate load disturbances in real time and provide feedforward compensation to the speed controller. Simulation and experimental results demonstrate that the proposed INFTSMC-ARL-NFTSMDO composite control strategy significantly enhances the dynamic response, steady-state accuracy, and anti-disturbance capability of BLDC control systems.</p>