Construction of farmland water conservancy has great significance to the agricultural development, and No. 1 document of the Central Committee of the Party focused on Three Rural Issues for eleven consecutive years, also the local governments paid high attention to and promulgated a variety of corresponding incentives and preferential policies. Liangshan Prefecture has made achievements in the construction of farmland water conservancy, but meanwhile faces many problems. Investigation and research shows that insufficient construction input causes the weak foundation, which can easily bring out chain reactions by intense and frequent natural disaster; special natural conditions cause the construction delay of high standard basic farmland of which middle and low output are in the majority. In accordance with present situation which includes solutions for water shortage , enhancement of construction and management, construction of standard basic farmland ,we put forward that: (1) combination of water impoundment and diversion & embankment , simultaneous development of medium , small and micro irrigation and water conservancy engineering. (2)Insisting the policy of the government guidance and the farmer main body ,which managed by the people and subsidized by the state & multi subject cooperation.(3)In order to promote high standard basic farmland by Construction of farmland water conservancy, structuring the objective of high standard basic farmland which is focused on government investment with the definite main body.