Abstract: Geomorphological mapping is to represent geomorphological research results on maps by means of mapping. It is very important to develop geomorphology and geomorph-cartography, as well as its practical application. Nowadays, the study of 1:1000000 geomorphological mapping is being carried out in China, the Qiqihar sheet is one of the five sheets in advanced experiment. Based on the practice, the authors expound how to use the basic mappable data in compilation and how to work out the classification system of geomorphological mapping; and analyse the advantages and shortcomings of the simple synthetic map type and the analytical combination map type. Through comparison, it can be seen that the analytical combination map type is better than the simple synthetic map type because of wide information, rich contents, distinct lays, and clear primary and secondary. So the experts in geomorphological mapping of most countries have adopted it in recent years. The mapping representation and legend design principle of legend system are discussed. Finally the geomorphological characteristics of mapping area and mapping representation are dealt with, especially the representation of plain geomorphology in detail.