The purpose of this thesis is to understand dynamic behaviors of carbon fiber composite golf shaft and the influence of different carbon fiber shaft flexes on club heads. To achieve the purpose, the researcher used the finite element method (FEM) software LS-DYNA and ANSYS to analyze the dynamic behaviors of carbon fiber composite golf shaft. He also applied three rigid bodies and two revote joint in a swing mode to simulate swing motion. In the same driving moment, the comparison provides golfer with a reference for selecting suitable carbon fiber composite golf shaft. It also offers other researchers an FEM model to do further analysis of dynamic behaviors of golf heads with the carbon fiber composite shaft.