The invention discloses a two-dimensional code secondary traversal binarization method and device and a storage medium. The method comprises the steps of obtaining an original image, preprocessing theoriginal image to obtain an input image and an integral image, carrying out transverse scanning traversal on the input image in combination with the integral image to obtain a coarse positioning sub-graph and coarse positioning parameters, and binarizing the coarse positioning sub-graph according to the coarse positioning parameters over time to obtain a binarization result graph. According to the method, only two times of traversal are executed, the binary image does not need to be traversed, the calculation amount is greatly reduced, the calculation efficiency is improved, and therefore rapid identification of the fuzzy two-dimensional code is achieved.