A typical dynamic reconstruction-based super-resolution video involves three independent processes: registration, fusion and restoration. Fast video super-resolution systems apply translational motion compensation model for registration with low computational cost. Traditional motion compensation model assumes that the whole spectrum of pixels is consistent between frames. In reality, the low frequency component of pixels often varies significantly. We propose a translational motion compensation model via frequency classification for video super-resolution systems. A novel idea to implement motion compensation by combining the up-sampled current frame and the high frequency part of the previous frame through the SAD framework is presented. Experimental results show that the new motion compensation model via frequency classification has an advantage of 2dB gain on average over that of the traditional motion compensation model. The SR quality has 0.25dB gain on average after the fusion process which is to minimize error by making use of the new motion compensated frame.