Unreasonable use of pesticides， fertilizer， mulch film and agricultural irrigation water as well as improper treatment of animal wastes has not only given rise to serious environmental problems such as white pollution，desertification， salinization， soil erosion etc， but also caused huge waste of resources. One of the way out is to carry agricultural sustainable development through technical innovations in agricultural engineering.This paper analyzed the role of technical innovations in agricultural engineering in sustainable agriculture and highlighted several problems that deserve attention.