The invention provides a single-
rope recovery method of an unarmored cable 
deep diving submersible. The method comprises following steps: (1), an emitter is mounted on a 
deep diving submersible; (2),one end of a throwing 
rope is fixed on the 
deep diving submersible, and the other end of the throwing 
rope winds around a bullet; (3), after the deep diving submersible returns to water surface near amother ship, an operator on the mother ship controls the emitter to start by a remote-
control unit; (4), the bullet carrying the throwing rope flies and lands on the mother ship; (5), the operator onthe mother ship takes down the throwing rope from the bullet, and then one end of the throwing rope is fixed on a 
mushroom head; (6), a 
winch rolls up and hoists the 
mushroom head and the deep divingsubmersible through the throwing rope; and (7), a lifting arm is started to lift the deep diving submersible connected with the 
mushroom head onto the mother ship, and 
recovery is finished. A cable is thrown on the mother ship by the aid of the emitter, so that the operator is not required to perform 
underwater operation, risks of the operator are reduced, and working efficiency is increased.