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In view of problem that general control strategies of brushless DC motor are difficult to achieve desired effect affected by motor itself, the paper introduced a controller combined with integral inversion adaptive sliding mode variable structure control and fuzzy control. The controller adds integral term to sliding surface to realize tracking without static error, and improves steady precision of control system. It uses fuzzy controller to solve the problem that gain setting of switching control can only rely on experience, and estimates uncertainty by fuzzy control algorithm, which effectively reduces chattering brought by sliding mode control method. Reaching law was redesigned to further improve control performance. The simulation results show that the controller can significantly improve performance of control system of brushless DC motor.