Pig fattening is the last link in pig production. It strives to use the least amount of feed and labor to obtain low-cost, high-quality products in the shortest time possible to meet the needs of the market. The growth of pigs is based on the interaction between the genetic basis obtained and the environmental conditions in which they are located. Understand the factors affecting fattening, and adopt targeted feeding and management measures. This article explores how fast fattening pigs can be slaughtered through genetic hybridization advantages and feeding management. By making full use of the advantages of crossbreeding, the use of binary crossbred pigs can increase 15-20% daily weight gain compared to purebred pigs, and the triad hybrid pigs increase about 25% over purebred pigs. Buying piglets is a great science. To select 30-kilogram or more hybrid pigs as commercial pig fattening objects, make full use of the advantages of hybridization, the hybrid combination is best for three-way hybrids of good varieties, and good soils for three-way hybrids. Farming facts prove: Using binary hybrid pigs can increase daily weight gain by 15% to 20% compared to purebred pigs, and three-way crossbred pigs increase by about 25% compared to purebred pigs. At present, most domestic hybrid sows using Landrace and Yorkshire are mated with Duroc boars to obtain the best ternary combination. The selected hybrid pigs were robust, well-balanced, and had thick bones. We must not be sick, weak, or disabled. This is the basis for guaranteeing pig production performance and benefits. The bigger the piglet's primary weight, the better it is to raise, the faster it gains weight, and the weaner weight is greater. According to the experiment, weaning pigs with large weaning weights were reduced by 1-2 months compared with the weight of weaning pigs under the same feeding conditions. Scientifically selecting feedstuffs, in pig production, feed costs account for more than 70% of the total cost of raising pigs, and the efficiency of raising pigs depends to a large extent on how to scientifically select feeds. Some pig farmers have little knowledge of feed and there are some misunderstandings in purchasing feed, which affects the benefits of raising pigs. First of all, we must avoid misunderstandings in the choice of materials and, by comparison, look at the ratio of meat to meat, and choose high-quality, high-efficiency feeds. When using premixes or concentrates, they must be formulated with good ingredients and should not be picked up at random so as to meet the nutritional needs of the pigs. Pigs should be used at different physiological stages (suckling pigs, piglets, pigs, pigs, boars, and sows each have their own feeding standards), otherwise it will cause feed wastage or poor pig growth. Piglets should "grab three foods" and "over three levels." Grasping milk food, overgrowth good growth; grasping open food, over good feed off; grab busy food, over good milk off. Piglets should not be fed too full to prevent too much fine material, otherwise it will cause diarrhea and induce edema disease. Do not suddenly change the material. Mix the original material with the new material, gradually reduce the original material, and add new materials. After 5 to 7 days, complete the refueling process. The coarse fiber in the pig material should not be too much, and the green feed should be properly matched to prevent a single feed, so as to avoid nutritional deficiencies and nutritional insufficiency. Feeding adopts "four changes". The number of feedings will be fixed, the feeding time will be determined, the feeding amount will be set, the feeding standards will be set, and the moisture-removing and seasoning materials will be fed to the pigs as dry powder. The piglets were fed 5-6 times a day, medium pigs 4-5 times and big pigs 3 times. The feeding time should be relatively fixed every day. The amount of feed fed should be balanced each time. Give enough clean drinking water. To ensure that fattening pigs have a strong metabolic ability. For the disease, prevention must be the main method to prevent and cure diseases. There are many kinds of pig diseases and the cause is complex, but the first cause of death is still infectious diseases, especially swine fever, swine erysipelas, swine pneumoconiosis, paratyphoid pig, E. coli disease. We should adhere to the principle of “disinfection as the priority, prevention as the first, and prevention and control in parallelâ€. The pig farm should be sterilized at least once every 7 days. The vaccine should be injected at the right time. Once the diseased pig is found, it should be treated immediately. While paying attention to infectious diseases, we must also be alert to consumptive diseases, because he will cause unnecessary losses to pig farmers, such as parasites, panting, delirium and so on. For newly-introduced piglets, it is best to take insect repellent in the feed for 8 to 10 days to repel insects. When the weight reaches 60 to 70 kg, it can be repelled once. Elaborate management and reasonable rearing. Pigs can only scientifically use feedstuffs under the proper conditions of temperature, humidity, clean ventilation, etc., so that pigs can give full play to their performance and increase feed conversion rate. Otherwise it will cause the pig's stress, pig's resistance and immunity to decline, increase morbidity and mortality, and cause huge losses. If temperature and humidity are too high, the feed intake of the pig will decrease and the daily gain will decrease. If the temperature is too low, the energy consumption is large, the feed intake is large, and the feed payment is low. The pig house temperature should be controlled at 20-30°C for piglets, 15-20°C for pigs, and 50-55% humidity. Newborn piglets should pay attention to auxiliary breast milk to help them fix the nipple. In general, weak piglets are placed in the anterior middle nipple, and relatively strong piglets are placed in the posterior nipple. Piglets should be fed early and at the same time pay attention to "eat less food" to prevent diarrhea. Reasonable breeding density. It is appropriate to occupy 0.8-1 square meters per pig. 3-4 months old pigs accounted for 0.6 square meters, 4-6 months of age accounted for 0.8 square meters, 7-8 months of age 1 square meter. Each pig occupies 1.1-1.2 square meters in summer and 0.9-1 square meters in winter. Implementation of the same nest breeding. Piglets from birth to fattening slaughter, the implementation of the same litter of the original circle feeding method, than after weaning transfer polymixing method is effective. Due to the reduction of stress stimuli, daily gains of 7-8% can be increased, and the fattening period can be shortened by 20-30 days. Iron supplements as early as possible. After birth, piglets need to consume 7 mg of iron daily, while only 1 mg of iron can be obtained from breast milk. If the piglets intramuscular injection of 1 ml of ferritin, the effect is better. Castrated early. The earlier the age of castration, the lower the stress on the piglets. The castration was 20-25 days old and was castrated after weaning at 60 days. The daily gain increased by 5-6%, and the slaughter period was shortened by 15-20 days. 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