This　paper　deepens　the　definition　of　tacit　knowledge　and　dynamic　core　capacity　through　literature　research,　analyzes　the　connotations　and　characteristics　between　tacit　knowledge　and　enterprises＇　dynamic　core　capacity,　clarifies　their　relationship,　and　points　out　that　tacit　knowledge　is　the　ultimate　source　of　dynamic　core　capacity.　The　article　sets　up　a　theoretical　model　of　dynamic　core　capacity,　and　uses　the　model　to　analyze　how　dynamic　core　capacity　comes　into　being.　A　case　study　of　Qirui　Automobile　Company　proves　that　dynamic　core　capacity　to　great　extent　depends　on　tacit　knowledge　and　its　utilization　of　the　company.