A device for accelerating separation of the head and the body of an aircraft comprises a device body (3-1), a central spindle (3-2), a compression spring (3-4) and a blanking cap (3-3), wherein two inner holes are symmetrically formed in the device body (3-1), one end of each inner hole serves as a guiding hole, the other end of each inner hole serves as an internal threaded hole, the diameter of each guiding hole is smaller than that of the corresponding internal threaded hole, one end of the central spindle (3-2) is connected with the blanking cap (3-3), an outer stud is arranged at one end of the blanking cap (3-3), a positioning flange is arranged at the other end of the blanking cap (3-3), a through hole is formed in the axial center of the blanking cap (3-3), an outer stud of the central spindle (3-2) extends out of the through hole after the outer stud of the blanking cap (3-3) is screwed into one internal threaded hole of the device body, and the compression spring (3-4) is arranged between the blanking cap (3-3) and the central spindle (3-2). By the adoption of the device (3), the head and the body of the aircraft can be separated quickly and reliably.