1. A super-resolution method for a video image, the method comprising: performing super-resolution processing based on fuzzy motion estimation by integral multiple times on an original low-resolution video image, to obtain an intermediate high-resolution video image, wherein the integral multiple times is an integral multiple between a resolution of a target high-resolution video image and a resolution of the original low-resolution video image; when a resolution of the intermediate high-resolution video image is different from the resolution of the target high-resolution video image, calculating a non-integral multiple between the resolution of the target high-resolution video image and the resolution of the intermediate high-resolution video image; and performing super-resolution processing based on interpolation by the non-integral multiple times on the intermediate high-resolution video image, to obtain the target high-resolution video image.