Quality indexes of 168 new maize varieties released in Jilin province from 1999 to 2004 were analyzed.The results showed that crude protein content of most varieties was from 9 percent to 11 percent,with little change between each year.The crude starch content was lower than national standard,whereas it has increased steadily since 2001.The crude fat content of most varieties decreased gradually.The grain density was relative high in recent 4 years and 80 percent of all varieties came up to the second national standard,while there was a decrease tendency among years.