The invention discloses a license plate positioning method based on a multi-dimensional edge feature. The method comprises the steps that firstly, an original image is processed through a related image pre-processing method; secondly, edge points not conforming to conditions are removed through image edge length and edge density scanning; thirdly, the original image is processed through a color descending dimension method, and color feature information corresponding to edge feature points left in the second step is obtained; fourthly, a license plate area is accurately positioned according to the color information of the image edge feature points. The license plate positioning method is used for acquiring segmenting information of a reference image and is applied to a license plate positioning system, the calculation speed is higher, the real-time performance is good, the positioning information is accurate, and the capacity for resisting interference of the background of the image is high.