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Aiming at a six degree of freedom motion mechanism of a wind tunnel CTS test, the control method is studied based on the analysis of the structural characteristics and kinematic relationship of the mechanism. The six degree of freedom motion mechanism consists of three angular displacement and three linear displacement. Firstly, the motion model of the mechanism is established, and the transmission relationship and mutual movement relationship of each axis are analyzed. According to the nonlinear relationship of angle drive, a follower control method based on virtual axis is adopted. Realize the uniform speed control of the actual angle.The relationship between position and velocity is analyzed according to the six degree of freedom motion relationship, and six degree of freedom linkage control is realized by speed compensation method. The high performance motion controller and driver are used to form the angle double closed loop control system, and all the motion functions required by the organization are realized. Finally, the accuracy of angle control is measured by experimental verification. The results show that the angle control precision is all or exceed the design index, and can meet the requirements of the wind tunnel CTS test.