The invention discloses an area enhanced precision positioning service method suitable for large-scale users. According to the technical scheme, the method includes the steps that after the users effectively fix wide-lane
ambiguity and L1
ambiguity of at least four satellites in a zero difference network RTK
processing mode, area enhanced information of surrounding base stations does not need to be acquired, at this moment
ambiguity fixed results and
zenith troposphere delay residual errors acquired by interpolation are used as known truth values, received
satellite UPD information is combined, and an ambiguity fixed solution in a PP-RTK mode can be immediately acquired without initialization. Due to the fact that
satellite UPD, real-time
satellite orbits and real-time satellite
clock errors are only related to the satellites, and short-term forecast lasting tens of seconds to a few minutes can be conducted, the information can be broadcasted to the users through the communication satellites in a broadcast mode, and then real-
time data communication burdens among the users and the base stations can be greatly reduced. Once user ambiguity is firstly fixed, the number of the users simultaneously serviced by an area enhanced
system is no longer restricted at this moment.