This　paper　integrates　the　ideas　of　divide　and　conquer　and　put　the　heads　together,　and　proposes　a　method　of　selecting　sub-networks　on-line　based　on　fuzzy　decision-making.　For　a　given　input,　this　method　calculates　the　distances　between　the　input　and　the　centers　of　sub-networks　firstly,　and　then　obtains　the　fuzzy　member　degree　based　on　distance　measure,　finally　realizes　on-line　sub-networks　selection　by　fuzzy　decision-making.　The　group　of　selected　sub-networks　varies　with　different　inputs.　It　ensembles　multi　sub-networks　by　linear　method.　The　weights　of　sub-networks　are　optimized　by　reconstructing　the　sample　space.　The　simulation　results　suggest　that　this　method　can　improve　the　precision　and　generalization　ability　effectively.　©　2011　IEEE.