Climate　and　precipitation　of　city　has　undergone　great　changes,　waterlogging　and　drought　events　caused　by　extreme　weather　events　is　seriously　affecting　the　normal　operation　of　the　city　and　people＇s　production　and　life.　This　paper　analyzes　the　rainfall　patterns　of　Beijing　in　recent　years　on　the　basis　of　rainfall　data　nearly　68　years,　including　changes　of　all　levels　rainfall,　extreme　rainfall　event　occurrence　and　changes　in　short　duration　of　heavy　rainfall　events.　The　results　show　that　The　possibility　of　short　duration　extreme　rainfall　increased　nearly　a　decade.　This　provided　an　effective　basis　for　design　of　Beijing　rainfall　exclusion　and　waterlogging　disaster.