Abstract: It is the development trend of agricultural informatization construction ,In order to Satisfy the Farmers"Needs of Learning Modern Agricultural Science and Technology Knowledge,to construct of Online Open Course of agriculture in “Internet+” Age. This paper introduces the characteristics of online open courses in agriculture, such as openness, large-scale, interaction and individualization. It expounds the content of online open course construction in detail, that Provide theoretical support and practical reference for the Construction of Online Open Course of agriculture.