Abstract: This paper mainly aimed at the hole fertilization technology of sorghum, designed a set of hole fertilization control system of sorghum, combined with the hole sowing technology of sorghum and the same application technology of seed and fertilizer, completed the precise fertilization control system according to the drop of sorghum seeds and accompanied by hole fertilization.At the same time, the discrete element analysis software is used to simulate, through the data comparison between the simulation test and the actual test, the relationship between the rotation speed and the amount of fertilizer discharge is analyzed based on the determination of hole fertilization, so as to achieve the combination of theory and practice.At the same time, PID control strategy is used in this paper.The biggest advantage of PID control in the research of control algorithm is that the control mechanism is completely independent of the mathematical model of the object. Only the error between the control object and the actual behavior of the controlled object is used to produce the control strategy to eliminate this error.It can accurately model and start the accurate analysis of the researchers. The experimental results show that the PID parameters of the control system are combined with the fuzzy control, and the simulation results are consistent with the actual data through the simulation test, which can have superior performance, high precision, better control effect and simulation effect.