When the horizontal axis wind turbine is faced with high wind speed changing conditions,it is very easy for the rotor to run out of control and overspeed,at this time,the wind energy conversion efficiency is lower than the expected value.At the same time,the bad environment also puts forward fault tolerance requirements for the pitch angle control.To solve these problems,an adaptive constrained control scheme of wind turbine with power regulation and fault tolerance was proposed.It can realize safe and reliable power regulation through adaptive constrained pitch angle control,and it is integrated fault tolerance to compensate for possible fault effects.The mathematical model and operation requirements of the horizontal axis wind turbine were introduced.The design process of the benchmark nonlinear adaptive constraint control scheme was shown.On this basis,the design scheme with unknown control gain,arbitrary initial conditions and fault influence was discussed.Finally,a MATLAB simulation model was built to verify the proposed scheme.The simulation results show that the proposed scheme can improve the power regulation efficiency of the wind turbine,and control the rotor speed and power generation within a safe range under different working conditions or fault conditions.