Abstract: "Low carbon economy" concept is from the United Kingdom put forward in white book "our future sources of energy establishes low carbon economy " first, it's target is to slow down climate change and to promote human being's sustainable development. Low carbon agricultural economy is able to cut down an agriculture discharging large amount of greenhouse gas, answers the threat that the climate changes to the agriculture, realizes and new capital rural area sustainable development. The author converges from low carbon estate, low carbon agriculture , low carbon industry, low carbon environment, carbon low carbon of subtraction carbon five aspect put forward agricultural economy is in the Sustainable development of Building Beijing new socialist countryside.