Abstract: Failures of the control components (actuators and sensors) in practice usually results in the unstability of a control system or can not attain the desired performance. Therefore, it is very important to investigate how to achieve the control goal using scanty effective control components. Whether some of the control components in the measurement set are invalid or not the reliable problem is about designing a controller to guarantee the stability and all the desired control performance. A design method of reliable linear quadratic state feedback controller for linear descriptor systems with actuator failure is presented. The designed state feedback controller guarantees systems regular, asymptotically stable and impulse-free against the actuator failure.