Based on NTRIP 2.0 foundation-enhanced data transmission system, the problem of differential data transmission difficulty and the number of supporting users is solved in the paper. The system includes three parts: senders, broadcasters, and clients, which are important components of the system and can be accessed simultaneously by 200 senders and 300 clients. The system has been applied to the Beidou foundation reinforcement system, which effectively improves the transmission efficiency of differential dada, significantly improves the number of users, and verifies the system’s performance.