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With the continuous development of many engineering applications, sometimes, integer order controllers can not meet the requirements of the index. Because of the progress of computer simulation and mathematical theory, fractional control theory comes into being. Given the fractional control theory, this paper first introduces the fractional controller’s theoretical basis and description form and then proposes a fractional controller. The reinforcement of the fractional controller is analyzed in the frequency domain direction, and the fractional controller is applied to the pitch angle control of the aircraft pitch channel. The simulation results show that in the pitch angle control on the longitudinal channel of the aircraft, the proposed controller in the longitudinal control loop makes the aircraft’s pitch angle control significantly improved in control accuracy, dynamic process, and steady process compared with the traditional controller.