Abstract:In order to investigate the methods of producing the selenium-enriched pork by using the selenium-enriched yeast，60 pigs crossed between large yorkshire and landrace were selected. The pig's average weight was 70 kg. According to the test requirements， 60 pigs were randomly divided into three groups and fed with dif－ ferent amount of mixed feed adding selenium-enriched yeast . In the course of experiment， 3 pigs were random－ ly selected from each group in the experimental time of the 20 th day， the 30th day and the 40th day to slaughter to detect the amount of selenium in the pork by using the longest muscle in the back of the pig. The results showed that：In the course of producing the selenium-enriched pork by using the selenium-enriched yeast， two motheds of adding the selenium-enriched yeast to the mixed feed were used.The first was to add selenium-en－ riched yeast to the mixed feed by 0.2 mg/kg before 30 days of the pig marketing；The second is to add selenium-enriched yeast to the mixed feed by 0.25mg/kg before 20 days of the pig marketing.The amount of the selenium in the pork by the two raising methods all can reach the standard of the selenium in the pork required by the Shaanxi Provincial standard -DB61/T556-2012.