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In order to provide three dimensional (3D) models with complete agronomic information and high fidelity for the construction of digital maize system, a 3D template resource library of maize organs was constructed. Firstly, maize plants were subdivided into basic structural units, including nodal root, lateral root, mesocotyl, stems, sheath, leaf, tassel and ear. Secondly, the data acquisition standard of major maize organs was established from the perspective of 3D data acquisition by analyzing the morphological and structural features of the organs. 3D data of the maize organs were acquired by using 3D scanners and 3D digitizers according to the standard, and geometric models of the maize organs were constructed on the basis of the measured 3D data. Finally, the 3D template resource library of maize organs was constructed by assembling these geometric models. The library took cultivar, organ name, growth period etc. as its key words for resource retrieval. It contained a large number of maize organ models of different cultivars and multiple growth periods with consistent agronomic parameters. The construction of the library would promote the digital maize system and played a great role in the research, production, promotion and demonstration of maize industry, it also provided a reference for the 3D resource library construction of other plants.