Abstract: Meteorological facsimile map contains a lot of salt-and-pepper noise. The adaptive median filter algorithm is proposed in this paper, which has better performance in reducing noise of meteorological facsimile map. The simulation of median filter algorithms was implemented to verify the noise reduction effect in meteorological facsimile map,and through the comparison of a large number of removing salt-and-pepper noise algorithms. The results show that the algorithms can remove noise of meteorological facsimile map efficiently.