Three topics are discussed in this paper:1.The significance and the present state of medical maps;2.The contents and drawing methods of medical maps;Medical maps should consist of present state of disease distribution,changinglaws of disease distribution,environmental conditions of disease area and pre-ventive measures,ctc.As for drawing methods,several calculating methods areprimarily introduced.3.Expressions for medical maps.Expressions for medical maps should be chosen according to their contentsand calculating methods.Several typical expressions for medical maps are introducedin this paper.