In navigation war, the technique of satellite power-enhancement has been an important measure to improve the viability of the satellite navigation system. With regard to the problem about how to maintain the navigation capabilities of Compass system for the territory of China and the surrounding area in the context of navigation war, this researcg presents a satellite navigation system power enhancement program based on mixed constellation and guidelines of best GDOP value. Then, the effect to the performance of coverage, availability and implementation complexity in area covered by power enhancement signals under different realization types was analyzed. The results from simulation show that ‘5GEO+4MEO’ combination of power enhancement can achieve all-time coverage with the avalibility level of 100% (GDOP<6.3) for our country’s territory and coastal regions. Furthermore, this scheme also has the quality of low complexity and good stability and can be introduced as a regional power enhanced options.