With　the　continuous　improvement　of　the　database　technology,　user　data　is　continuous　accumulating,　the　needs　of　users　also　rises　ceaselessly,　on　top　of　this,　the　management　of　database　connection　significantly　affect　the　whole　application　on　flexibility　and　robustness,　and　also　affect　the　performance　indicators　of　the　program.　Database　connection　pool　is　brought　out　to　solve　this　problem.　Based　on　the　JDBC　norms,　this　paper　expounds　the　mechanism　of　database　connection　pool,　and　realized　the　technology　of　effective　management　database　resource.