Abstract: The navigation constellation design is involved in the optimization issues of many(parameters).The goal of constellation design is to search a set of parameters and generate a(navigation) constellation using the ones.The constellation has not only the optimal performance,but also save the developing and maintaining cost of the satellite navigation system.Firstly,the(indexes) of evaluating constellation performance,algorithms of constellation availability and method of semi-analysis constellation design are presented as an important part.Secondly,the effects of the designed parameters on the constellation performance are analyzed and illustrated in detail,and(further) three global navigation constellation schemes given.Finally,by comparing and analyzing the performance indexes and positioning simulation results respectively based on three constellation schemes,it can be shown preliminarily that the semi-analysis method and constellation schemes are feasible.