The compensable range of the existing electronic image motion compensation method is limited in scanning direction. To solve this problem, a digital time delay and integration (TDI) method suitable for wide-range image motion variation in scanning direction is proposed. First, based on the image motion calculation results, whether the image motion is within the range of electron frequency compensability is judged. Then, the image motion mismatch in scanning direction will be adjusted by image interpolation and matched pixel accumulation when it is not within the compensable range. A digital TDI algorithm model suitable for arbitrary image motion is constructed. Finally, the proposed algorithm is verified by experiments. The experimental results show that when the total image motion of 96-stage integration is much smaller than one pixel size, the image quality of the proposed algorithm is similar to that of the traditional TDI method, but when the total image motion of 96-stage integration is larger than one pixel size, which exceeds the compensable range of the electronic method, the image quality of the proposed algorithm is much better than that of the traditional TDI method. The traditional TDI method causes serious aliasing and the image quality drops sharply; however, the proposed algorithm can maintain the image quality effectively. Both the image motion transfer function and the similarity correlation measure can be improved by 0.11 using the proposed algorithm.