Abstract: Operating speed is a very important factor in variable pesticide application. If the application rate per unit area is fixed, the corresponding nozzle flow can be realized according to the operating speed to achieve the purpose of variable pesticide application.Therefore, the accuracy of the operating speed collection directly affects the accuracy of the nozzle flow.Aiming at the accuracy of operating speed acquisition, tests are used to study the comparison of the acquisition accuracy of the Doppler radar speed measurement and the BD-8953 DN receiver.The results show that the speed value output by the BD-8953 DN receiver and the speed measuring radar under cement ground conditions is relatively stable, the speed deviation rate is small, and it is in good agreement with the average speed, and the speed measurement accuracy is high.The speed deviation rate of the speed measurement radar under the condition of irrigated and plowed land is the largest, reaching 6.0%, and the speed measurement accuracy is the lowest.The study provided an important basis for how to choose a better speed measuring.