The invention discloses a rocket take-off method, and belongs to the field of aerospace equipment. The rocket take-off method involves a fixed-wing aircraft, a control terminal and a rocket. The fixed-wing aircraft is provided with a square body and a signal module. The square body is installed on the back of the fixed-wing aircraft, the square body is in a long strip shape, and the square body protrudes out of the back of the fixed-wing aircraft by the certain height. The rocket is provided with a groove and an annunciator. The groove is installed in a main body of the rocket, the size and depth of the groove correspond to those of the square body on the fixed-wing aircraft, and therefore the square body can be inserted into the groove. The control terminal wirelessly controls the fixed-wing aircraft and the rocket through the signal module and the annunciator. A traditional rocket take-off way is changed, the fixed-wing aircraft can be recycled, and the launch cost of the rocket is reduced.