Abstract: As for satellite positioning system, selection of constellation type would greatly influence the performance.of positioning. Connected with Archimedes plan among constellation schemes for GNSS-2, this paper presents a GEO/HEO hybrid positioning constellation by using three HEO satellites and three GEO satellites, here the objective region is chosen as our country. Firstly, the parameters for GEO and HEO satellites are optimized from regional visibility. Secondly, positioning performance analysis for the given hybrid constellation are provided in certain region measured by GDOP and PDOP. Simulation results show that we can expect similar accuracy with GPS in certain region by the hybrid constellation put forward here.