The agricultural ecological and economic security of watershed means that a sort of situation which satisfy sustainable development of ecological economy of the watershed

containing 3 levels of contents and 3 important characters.According to the current status of the watershed in the loess hilly and gully region

the situation of agricultural ecological and economic security of the watershed can be divided into 4 grades: security

sub-security

insecurity

extreme insecurity

a majority of the watershed has been under the state of sub-safety or insecurity;Take Zhifanggou valley as an example

the author analyses the practical performance of the system in sub-safety situation.Researching on the main problem caused by the system in the situation of sub-safety or insecurity

the author put forward the countermeasures and suggestions: Developing ecological agriculture with commodity economy

and consolidating the coupled relation between industry and resources;Adjusting industrial structure and advancing industrial optimize and upgrade;Building up early-warming system of agricultural ecological and economic security of the watershed

and adjusting input of matter and energy outside the system in time.