A positioning method in a mobile network performed by a second base station, the method comprising: • if a distance between the second base station and a first base station falls within a preset range, receiving a first real-time kinematic, RTK, measurement value sent by the first base station, wherein the RTK measurement value is an RTK measurement value of the first base station for a RTK reference source installed on the first base station serving as a reference station, wherein the second base station has no RTK reference source, and determining first correction information as a single-reference station differential correction parameter according to the first RTK measurement value (step 602), wherein the first correction information is correction information for positioning information obtained by the RTK reference source from a positioning system comprising the first base station, the second base station and a mobile terminal, and the first correction information is correction information of the second base station; • if the distance between the second base station and the first base station falls outside the preset range, receiving from each of multiple first base stations serving as reference stations a RTK measurement value, wherein each of the multiple first base stations has a RTK reference source installed thereon, and determining second correction information as a differential correction parameter obtained by performing a joint resolving of the multiple RTK measurement values (step 602), wherein the second correction information is correction information of the second base station; • sending, if the distance between the second base station and the first base station falls within the preset range, the first correction information to the mobile terminal, and if the distance between the second base station and the first base station falls outside the preset range, the second correction information to the mobile terminal (step 604). • if a distance between the second base station and a first base station falls within a preset range, receiving a first real-time kinematic, RTK, measurement value sent by the first base station, wherein the RTK measurement value is an RTK measurement value of the first base station for a RTK reference source installed on the first base station serving as a reference station, wherein the second base station has no RTK reference source, and determining first correction information as a single-reference station differential correction parameter according to the first RTK measurement value (step 602), wherein the first correction information is correction information for positioning information obtained by the RTK reference source from a positioning system comprising the first base station, the second base station and a mobile terminal, and the first correction information is correction information of the second base station; • if the distance between the second base station and the first base station falls outside the preset range, receiving from each of multiple first base stations serving as reference stations a RTK measurement value, wherein each of the multiple first base stations has a RTK reference source installed thereon, and determining second correction information as a differential correction parameter obtained by performing a joint resolving of the multiple RTK measurement values (step 602), wherein the second correction information is correction information of the second base station; • sending, if the distance between the second base station and the first base station falls within the preset range, the first correction information to the mobile terminal, and if the distance between the second base station and the first base station falls outside the preset range, the second correction information to the mobile terminal (step 604).