Abstract: Under background of big data era, agriculture is gradually developing in direction of informatization, automation and digitization．The creation of an agricultural informatization application with big data characteristics can lay a solid foundation for improving level of agricultural economic development and realizing creation of an agricultural ecosystem base．Characteristics of agricultural big data were analyzed, key technologies of agricultural informatization application were explored．Key research on construction of agricultural informatization application was conducted based on big data, to promote agricultural informatization, digitization and intelligent development to make due contributions．