To　satisfy　norm　and　design,　this　paper　uses　global　optimization　to　confirm　form　work　placing　elevation　during　the　construction　and　completion　of　long　span　continuous　rigid　frame　bridges.　This　paper　proposes　optimum　level　of　completion　of　construction　stage　and　optimum　level　of　construction　completion　of　state　of　accomplished　bridge　of　long　span　continuous　rigid　frame　bridges,　proposes　optimum　completion　state　and　optimum　construction　stage　of　long　span　continuous　rigid　frame　bridges,　level　of　construction　completion　are　used　to　evaluate　approach　degree　between　construction　and　design.　Optimum　level　of　construction　completion　on　global　optimization　is　not　only　the　evaluating　indicator　but　the　critical　factor　in　construction　control.　The　method　presented　in　this　paper　is　used　to　analyse　and　guide　construction　of　Fuchunjiang　River　Bridge,　the　approach　degree　between　construction　and　design　satisfy　code,　the　example　is　a　good　illustration　of　the　soundness　and　practical　value　of　the　proposed　method.　Level　of　construction　completion　based　on　the　construction　control　program　are　used　to　guide　construction,　this　will　be　optimum　construction　state　and　optimum　completion　state　of　long　span　continuous　rigid　frame　bridges.