HIV (Human Immunodeficiency Virus) self-detection blood suction device

The utility model discloses an HIV self-detection blood aspirator which comprises a first needle tube, a limiting ring is arranged on the inner side of the first needle tube, a first piston is arranged on the inner side of the limiting ring, and one end of the limiting ring is fixedly connected with the inner side wall of a blood aspiration port of the first needle tube. By reversely rotating the rear cover, the first needle tube is separated from the rear cover, at the moment, the clamping rod is also separated from the movable block of the pulling device, the first needle tube is collected in a concentrated mode and replaced with a new first needle tube, the adaptation effect of the rear cover is improved, the continuous use effect of the rear cover is guaranteed, medical product waste caused by using disposable needle tubes is avoided, and the medical product is convenient to use. The sustainable use effect of the whole blood suction device is improved; the rotating frame and the sliding frame are connecte