The nutrient composition, fatty acid value, mycotoxins and swine bionic digestible energy of 28 stored corn samples collected from Heilongjiang granaries stored in 2013, 2014, 2015 and 2016 were detected. The results showed that compared with stored corn samples collected in 2014, 2015 and 2016, stored corn collected in 2013 had lower content of arginine and tyrosine (P<0.05) and higher content of deoxynivalenol (P<0.05); however, the deoxynivalenol content of corn collected in 2013 was below the safety limit in GB 13078—2017 Hygienical Standard For Feeds. Meanwhile, there were no obvious differences in nutrient composition (moisture, total energy, crude protein, crude fat, dietary fiber, phosphorus, neutral detergent fiber, etc.), fatty acid value, mycotoxins (aflatoxin B1、ochratoxin and zearalenone) and swine bionic digestible energy among the four groups of corn (P>0.05). In conclusion, the samples have similar nutrition value for pigs, so that all of them could be utilized in preparation of pig feed.