Abstract: The rapid development of dairy farming has brought the waste of resources and environmental pollution problems. This paper discussed the circulation agricultural model of scale dairy farm mode and put forward the relevant policy. Farmdung (including cow dung, urine and aquaculture wastewater) was proposedto be the main factor causing environmental pollution. And the grass could consume farm dung and turn waste into treasure, which was the main carrier of the agricultural cycle. Therefore, large-scale dairy farm can make the best use of grass, formed to build grassdyke-circulation agriculture model. Large-scale dairy farm needed a large amount of fresh grass and hybrid Pennisetum had high yield and high absorption rate for dairy effluent ammonia. This model which was built on three major factors, was a low cost and high efficiency, safe and high quality, clean and eco-agricultural model cycle.