In order to solve the problem of wide variation of aerodynamic and manipulation characteristics, parameter uncertainty of compound high-speed helicopter during the transition of different flight modes, a robust tracking controller based on T-S fuzzy theory is designed. According to the T-S fuzzy theory, the longitudinal non-linear compound high-speed helicopter model is transformed into the T-S model. Fuzzy feedback is introduced in tracing controller design. The Lyapunov method is used to prove that the asymptotic stability of system tracking error, and the linear matrix inequality (LMI) is used to solve the controller parameter. The simulation shows that the controller can guarantee that the compound high-speed helicopter could accurately track the airspeed reference command with strong robustness to uncertainty of system.