An image inpainting metod combining with Hough transform was proposed to inpainting the inevitable scanline dropping in satellite cloud image, which was based on median filtering. This method on the basis of scanline dropping positioning, was only collected neighboring pixels in vertical direction, and adjusted the window size according to the number of abnormal points. The total variation, the adaptive sliding average, and the adaptive median filtering which combined with Hough transform, have been compared from the high realtime requirement, subjective vision and evaluation parameters aspects. The simulation results show that this improved median filter based on scanline dropping distribution characteristics is more suitable as a satellite cloud image inpainting method.