The invention belongs to the unmanned plane flight control and guidance field, and relates to a method of adjusting a course interval quickly during flying of unmanned planes at equal intervals. The method is characterized in that an unmanned plane flight control system is used to acquire a maximum value and a minimum value of a remote control signal corresponding to any button switch of an unmanned plane remote controller, and equal proportion correspondence between the maximum value and the minimum value of the remote control signal and a maximum value and a minimum value of a course interval set by an unmanned plane ground station software is realized; during the flying of the unmanned planes at the equal intervals, the operators of the unmanned planes adjust the button switches on the remote controllers according to course interval demands, and the unmanned plane flight control system is used to calculate the course intervals required by the flight automatically according to the acquired remote control signals of the button switches. The steps of adjusting the course interval during the flying of the unmanned planes at the equal intervals and the required external devices are simplified, the time of adjusting the course interval is saved, and the utilization efficiency of the unmanned planes is improved.