The PI control strategy of motor used for road active ice melting and snow removal spray system is low efficiency and low accuracy. To solve this problem, a speed and current cascade control strategy is presented based on the second-order sliding mode control and active disturbance rejection control (ADRC) technology. The uncertainty mathematical model of three-phase permanent magnet synchronous motor (PMSM) for sprinkler system is established. According to the dynamic model of motor speed, a disturbance observer is designed to estimate the load torque and system uncertainty, and its convergence is proved. At the same time, combined with the super spiral sliding mode control algorithm, a compound speed controller is designed to adjust the motor speed. The results show that the proposed secondorder sliding mode ADRC strategy has a shorter response time, and the regulation time of the motor returning to the rated speed is 60% shorter than that of the PI control strategy, and the speed overshoot is only 48% of that of the PI control strategy. The proposed strategy has better robustness, can realize the full speed domain operation of the motor under the disturbance, and can improve the control accuracy and speed of the spray system.