Placing method of colloidal gold test paper on optical disk

The invention discloses a placing method of colloidal gold test paper on an optical disk. The placing method comprises the colloidal gold test and the optical disk. The test paper is integrally placedon the optical disk, and comprises a test paper layer and a substrate; a channel, an immersion liquid area and a test paper placing slot are arranged on the optical disk; the channel is connected with an external sample placing area and an immersion liquid area; the immersion liquid area is connected with the test paper placing slot, the test paper is placed in the test paper placing slot, a sample injection end of the test paper is inserted into the immersion liquid area. Multiple colloidal test papers are integrated on the optical disk to realize repeated single-item detection on the same optical disk; the detections of different items are performed by utilizing multiple placing ways of the test paper on the optical disk, the detection precision of the colloidal test paper can be improved, and the detection eff