Efficient and accurate GNSS data post-processing can greatly improve the efficiency of mapping work, this paper outlines the mathematical model of GNSS control network data processing and solving process, uses the data processing software GGO of Guangzhou Gio Electronic Technology Co. The results of the baseline solution and the difference between the baseline solution and the solution of the Leica LGO and COSA software are compared. The results show that the baseline solution and net leveling solution can be correctly performed with the software of this framework, and the error of baseline solution is within 3 mm in each direction compared with LGO, and the error of net leveling result is within 2 mm compared with COSA, which is sufficient to meet the requirements of engineering practice.