Abstract: In order to understand the accuracy and efficiency of near infrared spectroscopy（NIRS） and classical methods（Kjeldahl method of nitrogen determination and drying method） in the quality determination of forage maize, 80 forage maize samples in the experiment were collected for the determination of crude protein and water content by the NIRS and the classical methods, respectively. At the same time, the differences between the two methods were analyzed. The results showed that the results of crude protein and water content of samples determined by NIRS method and classical method could meet the requirements of national standards. There was no significant difference between the two methods（P＞0.05）,but classical method was time-consuming, costly and harmful to human health and living environment, while the NIRS method was simple, efficient, safe and environmentally friendly, which was suitable for large-scale application in feed enterprises. The results indicated that NIRS method was more suitable for the quality detection of feed corn.