The　term　structure　of　interest　rates　static　fitting　curve　refers　to　the　use　of　different　types　of　mathematical　function　to　describe　the　yield　curve　of　interest　rate　The　most　popular　method　of　static　fitting　is　to　use　a　B-spline　curve　to　fit　the　yield　curve　of　interest　rate　However,　this　method　is　often　subject　to　restrictions　on　the　order　So,　usually　the　fitting　is　on　the　third　order　Using　a　special　form　B-spline　curve　what　is　Bezier　curve,　we　get　the　term　structure　of　interest　rate　curve　of　government　bonds　for　China,　the　United　States　and　Japan　We　get　a　fitting　method　to　change　the　orders　of　curve　easily　Meanwhile,　the　complex　curve　fitting　calculation,　simplified　to　cluster　analysis　of　the　scattered　points