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Locomotive wireless communication is mainly used for data transmission between the train and the control center. If the communication network is congested, information transmission will be delayed or failed, which will affect the operation safety of the train. In order to improve the smoothness of Locomotive wireless communication access, a fuzzy logic based congestion control system for Locomotive wireless communication access is designed. The data packet is analyzed through the data analysis and classification module, and the WRED module completes packet loss processing, which is then transmitted to the queue module. The data is then organized and transmitted to the fuzzy logic controller module. In the fuzzy logic controller module, fuzzy control rules are designed using fuzzy logic theory, and the hardware design of the system is completed based on hop by hop congestion control. In the software design of the system, according to the cache of the wireless communication access data in the queue module, the state of the wireless communication access node is sensed, and the congestion of the wireless communication access path is predicted by obtaining the remaining queue of the wireless communication access node. Under the optimal path of wireless communication access, a congestion control algorithm is designed to achieve the congestion control of the Locomotive wireless communication access. The test results show that the designed system can achieve a throughput of 4000kpbs, with packet loss rates and node mortality rates below 1%, effectively controlling congestion in wireless communication access.