The characteristics of Precise Point Positioning (PPP), Network Real-Time Kinematic (NRTK) and PPP-RTK,three high accuracy satellite navigation positioning technologies, were compared and analyzed, the technical framework of PPP-RTKis introduced, the prototype verification system of Global Navigation Satellite System (GNSS) real-time high accuracy augmentationbased on PPP-RTK technology is designed and developed, and the accuracy and convergence time is tested and validated. The testresults show that the static and dynamic accuracy reaches the sub-meter level, the static convergence time is less than 3 minutes.