To　improve　the　detective　ability　of　complex　event　processing　(CEP),　we　combine　interval　temporal　logic　(ITL)　and　regular　expression　in　pattern　description　of　event　streams　constraint.　We　propose　different　timed　automata　to　support　varied　ITL.　The　pattern　described　by　regular　expression　improves　the　simplicity　of　the　pattern　description.　Meanwhile,　we　have　implemented　above　technique　in　a　CEP　system　to　test　performance.　The　experimental　evaluation　shows　that　the　pattern　can　be　efficiently　and　accurately　matched.