The　forming　of　enterprise＇s　core　competence　is　limited　by　factors　in　many　aspects,　such　as　products,　market,　management　etc;　however,　only　four　elements　are　essential,　just　as　the　four　indispensable　key　elements　in　stone-building:　Stone,　sand,　cement　and　water.　This　paper　offers　a　theory　that　the　forming　of　enterprise＇s　core　competence　attribute　to　the　co-processing　of　resources,　manpower,　key　skill　and　corporate　culture,　and　the　intention　is　to　explain　that　all　the　enterprises　can　form　its　own　core　competence,　so　long　as　he　possess　those　four　core　elements.