The invention discloses an ecological cattle breeding method. The method comprises the steps of cattle breeding, biogas fermentation, fermentation waste residue treatment and purchasing of crop straw.A breeding farm used for cattle breeding is selected to be close to large farmland. In the biogas fermentation step, a plurality of biogas fermentation pools are built around a livestock farm, a large amount of cattle dung generated in the breeding process is used for biogas production, residues generated after fermentation are sold to surrounding farmers to serve as planting base fertilizers, the crop straw is purchased from the farmers to be used as coarse fodder in the cattle breeding process, and the redundant straw can also be used for biogas fermentation. According to the method, the sustainable development concept is utilized, the cattle dung produced in the breeding process is used for producing the biogas, and then the residues are sold to the farmers to serve as the planting base fertilizers; meanwhile, the straw abandoned by the farmers in the planting process is used for breeding, so that production cost is greatly reduced, many by-products are generated in the cattle breeding process, the breeding income is increased, and the environment is protected.