Abstract: Farmland custom proto-institution is an important part of Marx and Engels’theory. Marxism farmland custom proto-institution is a scientific theoretical system, consisting such contents as the source of farmland custom proto-institution, land circulation (exchange) custom, land inheritance custom, the diversity, intercommunity and difference of this proto-institution, the influence of farmland custom proto-institution on farmland renting prices and land property right system, etc. The farmland custom proto-institution is not only existing in the rural areas, no matter in the past or at present, but also having greater influence on farmers and their economic activities. Therefore, we should take Marxism custom proto-institution of agricultural land as the guide to enhance the studies of farmland custom proto-institution.

Key words: Marx; custom proto-institution of farm land; land circulation custom