In the BDS service process,the construction of Satellite-based augmentation system(SBAS)is the internal demand for the self-improvement and continuous improvement of China's satellite navigation industry,and it is also the inevitable requirement of the standardized construction of BDS. Based on the principle of SBAS positioning and related standards,we study and implement the standard positioning algorithm that supports the current SBAS messages. In this paper,service performance of WAAS and EGNOS systems is analyzed by IGS site data and SBAS messages. In the data processing of the Crustal Movement Observation Network of China,the relevant errors can also be corrected with SBAS messages. The results show that the accuracy of positioning by differential correction information is significantly improved relative to single point positioning,with the statistics of horizontal better than 1m,and the vertical statistics better than 1.2m. Both WAAS and EGNOS showed a certain regional feature in the coverage of service performance due to the the ionosphere and observation constellations and distribution area of ground reference stations. Overall,the SBAS message characteristic by different system space segment GEO satellite is inconsistent,which all meet the demand for single-frequency positioning. EGNOS constancy is lower than WAAS,which exists interruption phenomenon. In real-time single-frequency positioning performance,WAAS service performance is better than EGNOS on the computed results.