Reliable data transmission method based on Beidou satellite

The invention discloses a reliable data transmission method based on a Beidou satellite. On the basis of the method, reliable data transmission between a director and multiple terminals can be achieved. In the data transmission process, the terminals number and send data packages, terminal numbers and data package numbers are analyzed after the director receives the data packages, the number of the received latest data package is informed to all the terminals in a broadcast mode, and the terminals can determine whether the director receives data reported by the terminals according to the number of the data package and can further determine whether a new data package is sent or an original data package is sent again. The director broadcasts and the number of the received data packages, the numbers of the latest data package reported by all the access terminals are encoded in a centralized mode and sent at a time, the problem that waiting time in a poll notification process is too long is avoided, and reliable transmission can be realized. The method solves the problems that communication transmission based on the Beidou satellite is low in frequency and small in data quantity, and it is very difficult to achieve reliable transmission through many times of hand shaking, and achieves reliable data transmission under the severe communication condition.