The　heavy　load　deflection　angle　milling　head　is　an　important　functional　component　of　5-axis　CNC　machine　tool,　which　is　used　for　large　and　complex　free-form　surface　processing.　The　characteristics　of　this　kind　of　milling　head　are　implementing　multiple　degrees　of　freedom　motion　with　revolution　and　deflection　angle　simultaneously.　Obtaining　milling　head　dynamic　and　static　characteristics　is　a　pre-requisite　problem　to　resolve　for　the　development　and　research　of　heavy　load　deflection　angle　milling　head　independently.　Dynamic　characteristics　are　obtained　through　combination　with　CAE　(Computer-aided　Engineering)　technique　and　experiment　validation.　For　CAE　analysis,　the　main　parts　of　milling　head　are　glued　together　considering　milling　head　operating　at　a　specific　position.　Experimental　validation　is　carried　through　with　initial　fixing　constraint　style,　which　validates　the　correctness　of　CAE　technique.　Experimental　and　CAE　analysis　results　are　compared　and　analyzed.　Therefore,　exact　dynamic　characteristics　of　milling　head　and　unsubstantial　segments　and　its　influence　factors　are　gotten.　Static　characteristic　is　obtained　considering　milling　head　operating　in　different　posture　by　CAE　technique.　The　analytical　method　of　three　points　at　half　of　cutter　are　loaded　is　introduced.　Calculated　results　indicate　that　the　deformation　of　tool　tip　is　the　largest　when　milling　head　operating　in　45　degrees　posture,　which　corresponds　with　the　deformation　situation　of　the　milling　head　operating　in　workshop.　The　analytical　results　of　dynamic　and　static　characteristics　of　milling　head　provide　theoretical　and　experimental　support　for　structure　optimization　and　improving　of　heavy　load　deflection　angle　milling　head.