The invention discloses a safe and labor-saving backrest unlocking device convenient to use. A pull ring support is fixedly installed on an upper transverse pipe of a backrest. The upper end of an unlocking pull belt penetrates the pull ring support to be connected with a pull ring. The lower end of the unlocking pull belt is hinged to the tail of a T-shaped unlocking handle. The middle position of the head of the T-shaped unlocking handle is hinged to a handle installation support which is fixedly installed in a framework of the backrest. The upper end of a left backrest unlocking pull rope is connected to one end of the head of the T-shaped unlocking handle. The upper end of a right backrest unlocking pull rope is connected to the other end of the head of the T-shaped unlocking handle. The lower ends of the left backrest unlocking pull rope and the right backrest unlocking pull rope are connected with floor locks on the corresponding sides of the backrest respectively. The handle installation support is formed by welding a 7-shaped supporting pipe and a stamped steel plate. The unlocking pull belt is hinged to the tail of the T-shaped unlocking handle through combination of a plastic sleeve and a step bolt. By the adoption of the safe and labor-saving backrest unlocking device convenient to use, the lever principle is adopted, much labor is saved for operation, operation can be finished through one hand, the backrest unlocking device is more convenient to use, the potential safety hazard that the hand is pinched is avoided, and manufacturing cost is reduced.