The invention relates to an enhancing method of low-light video images. The method comprises the following steps that (1) the optimal scale parameter of a Gaussian function in the single-scale Rctinex; (2) high-light images serve as reference images of color migration; (3) the images having whole rich colors and local outstanding details are obtained. Compared with the prior art, the enhancing method has the advantages of being good in image enhancing effect, obtaining rich image color information and the like.