The invention discloses a course control device of a flexible-wing unmanned aerial vehicle. The course control device can realize the high-efficiency control of the steering of the course of the flexible-wing unmanned aerial vehicle through controlling the matching of the pulling force and the speed of manipulation cables of a parafoil parachute. The course control device comprises a control system, an executing system and sensors, wherein each of the sensors is arranged on the corresponding manipulation cable of the parafoil parachute and is used for sensing the pulling force of the corresponding manipulation cable; the control system is used for performing treatment according to the pulling force detected by the sensors and sending a corresponding control signal to the executing mechanism; and the executing mechanism controls the corresponding manipulation speed of the manipulation cable according to the control signal, so that the purpose that the best operating speed is matched in a real time manner according to the stress of each of the manipulation cables is realized. According to the course control device and method disclosed by the invention, a control motor can have the best efficacy, and the mobile, flexible and high-efficiency course control is realized.