Abstract: The basic concepts and contents of ecological security and agroecological security were discussed in this paper.Ecological security could be defined as a dynamic state or degree of harmony,health and stability in quantity,quality and relationships for different scales of ecosystems including biological,environmental and resource factors.Agroecological security consists of agricultural environmental security,resource security,biological security and food security.Aseries of management countermeasures for agroecological security were put forward,such as to strengthen agroecological management,to develop eco-industries,to reasonably protect and exploit natural resources,ecosystems and biodiversity,to improve hazard-defense systems and to establish monitoring systems,laws and regulations for agroecological security.

Key words: Crops, Water deficit, Compensation effect