Abstract: In order to achieve precise temperature distribution,all possible factors are considered in the FEA model,such as the heat source and the way of heat dissipation.The heat source includes of bearings,gears,and cutting.And the heat dissipation includes of heat conversion,radiation and lubrication mode.The temperature change of key point on the angular milling head is analyzed and the characteristics of the angular milling head are obtained.The thermal experiment on the angular milling head under the practical cutting condition is carried on,and the temperature change of key point on the milling head is measured.The discrepancy between the experimental results and the analysis results is small.Therefore,the analysis model can simulate effectively the temperature change of the actual milling head,and the proposed method can be used to predict the temperature characteristics during the design of the angular milling head is effective.