In the pig production practice, if there are few boars and more estrus sows need to be bred in time, especially if some big pig farms implement synchronous estrus in sows, and there is no artificial insemination, when the breeding problem is in crisis. A continuous breeding of boars is a feasible method. This method is based on the characteristics of multiple ejaculations at the time of boar mating. It is described as follows: The number of ejaculates in boars varies greatly, sometimes 1-2 times, 3 times, 4 times, and many times. Up to 6 times, the number of continuous mating sows is determined based on the number of boar ejaculations. Every day at 5-6 pm or at 16-17 pm (depending on the season, the breeding time is slightly changed). The sows are assigned 1 time and reconstituted after 24 hours. Plan a few sows to be bred with a certain boar, and lap at the same time to the breeding site, and then rush the boar and let it jump to the first sow (before compounding, after initial allocation). See boar stability began to ejaculate, manifested as anal sphincter twitching or a testicular side of a little lifting, ejaculation is over. These performances stopped. The second sow was rushed to the side of the boar and the first sow was taken away from her body as far as possible without affecting the steady state of the boar. Pigs, boars can jump to the second sow. The entire process must not drive the boar. In turn, the same method is used to match the 3rd, 4th... At present, statistics are made for 3 years and 6 years. The boars are serially sow 56 times in a row. Among them, 2 heads and 21 heads in a row, with an average of 12.6 heads; continuous breeding 3 In the first 18 times, the average yield was 11.9 heads; six heads and three heads were allocated consecutively, and the average litter size was 11.8 heads. Control: 11.97 heads of litters were bred according to conventional breeding. Note: This method can not be compared with the pig's artificial insemination, the general boar is a certain degree of difficulty in continuous jumping pigs, it is impossible to 100% can complete the requirements of the breeding program, it is only an emergency expedient.