First, method 1. Pond preparation 220 acres of breeding bases were selected for breeding bases, and the original large ponds were converted into 65 ponds ranging from 2 to 5 acres according to the characteristics and requirements of the cultivation of crab species. A 40-mesh grate net is laid around the pool floor, and the bottom of the pool is covered with tiles. Artificial caves are created to prevent crabs from appearing during the cultivation process of crabs. The crabs are of uniform specifications and good physique. Properly set up the water peanuts and plant the Elodea, so that each pond forms a cultivating environment that fully simulates the natural ecological conditions. specific methods: (1) The pond area is 2 to 5 mu, the water depth is about 1.5 meters, and the drainage and drainage systems are matched to install anti-escape mesh at the inlet and outlet. (2) Clear pond disinfection. Before the end of March, carry out the exposure of the pond, use bleaching powder to disinfect, kill pests, the water depth of 0.5 meters is 10 to 15 kg/mu, 7 to 10 days after the drainage, and then use quicklime 100 to 150 kg/mu clear pond. (3) Planted aquatic plants in April. After 15 days of clear ponds, Elodea was released, accounting for 30% of the area for hiding inhabiting young crabs. (4) Small ponds are laid at the bottom of ponds in the ponds, which account for 10% to 15% of the floor area. 2. Bigeye larvae stocking (1) Large-eyed larval parent selection. In the Yangcheng Lake area, the pure Chinese mitten crab in the Yangtze River water system was selected as the parent. The male parents were between 150 and 175 g/body, and the female individuals were around 125 g/body. Each parent was required to have appendages that were sound and free from disease. With strong activity, special personnel are sent to the Tupai nursery in coastal areas to cultivate crab seedlings, and special personnel are assigned to supervise the whole process of seedling raising in the soil pool. (2) Seed stocking. In order to ensure the survival rate, 15 tons of organic fertilizer is applied per acre five days prior to planting, and water quality is cultivated so as to provide sufficient biological feed for the big eye larvae of the lower pond. (3) Stocking density. One kilogram of crab seedlings with an average of one mu of healthy and high-quality stocking is sized to about 140,000 eggs per kilogram. 3. Feed the feed According to the growth of juvenile crabs, eating and weather conditions determine the amount of feed each day. At the stage of bigeye larvae, feeding was performed 4 times a day, which was mainly composed of egg yolk and larval compound feed, supplemented with soymilk (mainly cultivated biological bait). After the metamorphosis, it was fed twice a day. The feed is mainly composed of artificial compound feed, and attention should be paid to the addition of aquatic plants. In the later period, some fresh fish are properly fed to provide necessary animal nutrition for wintering. A total of 65,000 kilograms of pellet feed was fed throughout the year, and 0.8 million were fresh fish. Medton Medical , https://www.medton.cn