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Abstract. In the production of the pig is very important to numerous sows, the pros and cons of its reproductive performance largely determines a pig production efficiency to numerous sows, number of weaned piglets (PSY) is reflected the sow management level and economic benefit of key indicators according to statistics, at present in China can be within the scope of numerous annual sows PSY between 14 and 25, and different areas and different scale pig farms PSY value difference is bigger, and some of the pig industry developed PSY an average of more than 30 European and American countries, there is a big gapIn sow in the field, the sow oestrus appraisal is to improve the reproductive efficiency and important technical measures in pig production efficiency, at present mostly adopt the way of artificial identification, larger workload in order to solve current indicators in the sow urine rapid application in rutting test, put forward in this paper, research idea, in the hope to guide production line of this article is to monitor the sow estrus sows urine before and after hormone level change, sow hormone levels in the urine is one of the rutting behavior standards, per sow in urine were determined estradiol (E2), progesterone (P),The hormone content of adrenocortical hormone (ACTH) and gonadotropin-releasing hormone (GnRH) was used to provide technical guidance for sow estrus. The four-factor weight model was established and the curve comparison of hormone content was carried out for the collected data to obtain the probability value of estrus model and determine the better mating time for guiding production.