The invention discloses a restriction choke rubber sleeve deliquescent agent dropping device which is designed for achieving smooth salvage of the restriction choke. The upper end of a connector of the device is connected with a steel wire; the lower end is connected with the sleeve body and sealed by an axial sealing ring. The upper portion of the wall of the sleeve body is provided with an injection screw hole which is connected with a nut and sealed by a rubber sealing ring. The inner wall at the bottom end of the sleeve body is stepped and connected with a bottom cap which is fixed by a radial pin inserted in the step; and the bottom cap is sealed by a sealing ring. A spring is arranged inside the sleeve body; the upper end of the spring is connected with the bottom surface of the connector, the lower end is connected with the bottom cap. The device can closely contact with the restriction chock, effectively dissolve the rubber sleeve, avoid waste of the deliquescent agent, and increase the salvage efficiency and success rate. The device is simple in structure, convenient in construction, safe and environment-friendly.