Beidou foundation enhancement system covering trunk line of Yangtze River and construction method

The invention discloses a Beidou foundation enhancement system covering the trunk line of the Yangtze River and a construction method. The Beidou foundation enhancement system comprises a base stationsubsystem, a broadcasting station subsystem, an integrity monitoring subsystem, a data processing subsystem, an equipment monitoring subsystem, a network transmission subsystem and a support guarantee subsystem. According to the invention, a reference station network reasonably distributed in the Yangtze River trunk line area is constructed so thatobservation data of Beidou satellite data information is obtained. Data deviation observation information within a certain period of time is obtained to provide basic data for eliminating interference of ionized layers and tropospheric layers on satellite signals, an AIS broadcasting station is constructed, Beidou differential positioning service is provided for Yangtze River inland river sailing ships, RTK data service is provided through a private network or a public