The embodiment of the invention provides a visual positioning method and device for a camera module lens. The method comprises the steps of obtaining an edge expansion image of a to-be-adjusted lens;performing shape matching on the edge expansion graph of the to-be-adjusted lens and a standard pattern to obtain a to-be-adjusted angle of the to-be-adjusted lens; wherein the standard pattern is anedge expansion graph of the standard lens; and based on the to-be-adjusted angle, assembling the to-be-adjusted lens. The to-be-adjusted angle is obtained by matching the edge expansion image of the to-be-adjusted lens with the standard pattern, and the to-be-adjusted lens or the standard pattern does not need to be scaled and rotated for multiple times in the matching process, so that the matching of a circumferential form is avoided, and the visual identification efficiency is greatly improved.