The invention relates to a character information identification method based on image processing, comprising the following steps: collecting images, and getting a target character image; for one target character image, comparing the target character image with matrix images in a matrix library in sequence to look for the maximum overlap area between the character of the target character image and the matrix of a matrix image; and when the overlap area meets set conditions, judging that a target character to be identified is the character of a corresponding matrix image. A matrix is designed to include an overlap area and a no-overlap area. By setting a no-overlap area, direct matrix matching and comparing can be carried out more accurately, and identification is quicker.