Abstract: Lack of study on principles of map design for color blindness leads to no such maps available for the color blindness,which is challenging cartography.Since red-green color-vision impairment takes 95% of the total color blindness,it is important to study on mp color design for those people.Based on characteristics of geographical attribute scaling,three color schemes(qualitative scheme,sequential scheme,diverging scheme) for maps are examined to that purpose.In order to observe features of map color used for red-green color-vision impairment,a series of color maps are made according to spectrum characters of the red-green color-vision impairment,and used for color psychological experiments.From these experiments,a part of principle of map colors used for red-green color-vision impairment is drawn out,which can be a good reference for making such maps.