Abstract: Based on the analysis of big data utilization in agriculture an d its＇ demands for professionals, the article took college of information and electrical engineering, China agricultural university as an example, we analyzed the present situation of undergraduate specialty setup and the problem of specialty vacancy, and further analyzed Chinese discipline system and regulations of undergraduate specialty provision to thereby explore big data-oriented undergraduate specialty orientation and optimization and its construction content. In the end, professional practical skill training and its optimum implementing scheme oriented to the need of big data were put forward from teaching link, experiment link, practice link and scientific research link.