1. 1 Construction of ecological breeding environment Ecological pig raising is put forward on the basis of the principle of complementarity between animals and environment. The natural system is an organic whole, and pigs are originally a part of the natural ecosystem, so the concept of ecological balance should be fully reflected in the pig breeding process. Building a harmonious and balanced ecological environment is the first step of ecological pig raising. Ecological pig raising requires creating a clean and hygienic breeding environment for pigs, and pig house breeding conforms to scientific density, so that pig farms can eliminate the pollution caused by pig raising and make the breeding environment conducive to the healthy growth of pigs. The best way is to establish an ecological farming biological chain. Some pig feed is planted in the pig farm, and pigs have a certain place to move freely. Excrements and pollutants can be treated organically and returned to pig farms, which embodies the concept of making full use of resources. The premise is that the pollutants must be treated harmlessly to ensure the health of pigs.

1.2 ecological feeding technology Ecological feeding technology refers to giving priority to green feed in the process of raising pigs and refusing to add antibiotics to promote the growth of pigs. Ecological pigs should have a healthy growth cycle. Farmers should pay more attention to the quality of pork, and on the basis of improving the quality, increase minerals, vitamins and dietary fiber feed to promote the growth of pigs. Adopting ecological feeding technology is helpful to improve the resistance and immunity of pigs and reduce the occurrence of epidemic diseases.

1.3 disease prevention technology is a difficult problem in ecological pig raising technology. In traditional pig breeding, epidemic disease is an important obstacle restricting the development of pig breeding, so ecological pig breeding must control the occurrence of pig epidemic disease from the root. First of all, pig farms should do a good job in pig immunization. Secondly, we should combine disease prevention with green breeding and scientific management. Some Chinese herbal medicines or probiotics can be added regularly in feeding to improve the disease resistance of pigs. In aquaculture management, we should do a good job in the harmless treatment and comprehensive utilization of feces, and strengthen the monitoring and disinfection management of aquaculture environment. According to the results of environmental monitoring, the farms should be disinfected regularly by means of physical disinfection and chemical disinfection, and the control of disease sources should be strengthened.

2. Development trend of ecological pig breeding 2. 1 There are many loopholes in the traditional pig breeding management, which leads to lax management and leaves an opportunity for the spread and occurrence of epidemic diseases. Information management breeding is a systematic management method of pig farms to improve the comprehensive management level of pig farms. For example, the pigs in the farm are numbered and recorded, and the living habits, genes, physical condition and illness of each pig are recorded. The farm is equipped with automatic monitoring equipment and intelligent sensor monitoring environment. The automation equipment sends the collected information to the management platform. Managers can comprehensively analyze the health status of pigs through big data and adopt unified management. The information management of aquaculture provides scientific and accurate basis for scientific aquaculture and disease prevention, and is of great significance to improve the economic benefits of ecological aquaculture.

2.2 Stereo farming mode Stereo farming is an important farming mode for the transition from traditional farming to ecological farming. The advantage of this farming model lies in making full use of farming resources. The most likely development direction of the three-dimensional pig-raising model in the future is to integrate the breeding of multiple organisms, build an ecological chain by applying the relationship between multiple organisms, design pigs as the upper layer in the ecological chain structure, provide green nutrition and feed from the bottom biological chain layer by layer, and adopt the way of ecological feed feeding for pigs. Among them, pig manure can be used as fertilizer for green feed to improve the optimal utilization of resources.

2.3 Cooperative farming mode Cooperative farming mode is the main direction for the development of pig ecological farming industrialization in the future. Industrialized ecological breeding can not be realized by a single subject, but requires the joint participation of multiple subjects to build a good ecological environment and breeding conditions and give full play to their respective advantages to take charge of some professional contents in ecological pig raising. For example, transform the green feed factory into an ecological pig farm, provide green feed, establish a unified regional excrement treatment center, and treat the excrement harmlessly, and then feed the treated renewable resources back to the green factory or farm for other purposes.

Conclusion The key technology of eco-pig breeding is to combine the concept of eco-environmental protection with pig breeding technology, integrate the concept of eco-environmental protection into all stages of pig breeding, and provide a green and pollution-free growth environment for pigs by constructing a good ecological breeding environment and ecological chain. Using green feed for healthy breeding to improve pork quality. In management, strengthening the prevention of epidemic diseases is mainly to enhance the resistance and immunity of pigs, and do a good job in immunization in a planned and targeted manner to prevent diseases. In the future, ecological pig-raising technology will combine information management mode and various breeding methods to achieve more standardized, standardized and scientific management, thus effectively solving the development obstacles faced by traditional pig-raising