Medical vagina sustained-release drug delivery device

The utility model relates to the technical field of vagina administration, in particular to a medical vagina sustained-release administration device which comprises a straight cylinder, a movable nut pair is arranged in the middle of the inside of the straight cylinder, a rotating cylinder is fixedly connected to one side of the nut pair, the rotating cylinder extends towards the tail end to the outside of the straight cylinder, and a threaded column is in threaded connection with the inside of the nut pair. A hollow column is arranged on the side, facing the head end of the straight cylinder, of the threaded column, a spray head is arranged at the end of the hollow column, and a control switch electrically connected with the pump body is arranged at the position, close to the tail end, of the outer wall of the straight cylinder. A medical worker can accurately control the depth of the front-end spray head entering the vagina through the spiral conveying rotating cylinder, so that the accuracy of the dosing a