Abstract: The whole-plant corn of milk-matured stage was chosen to process with cutting and rubbing, smashing, cutting respectively. Then the materials were ensiled in drums of 60 L and opened 60 days later. Results showed that the DM content, WSC content and CP content of the whole-plant corn were 23.53%, 9.12% and 9.35%, respectively, then the materials were good for ensilage. Results showed that there were no evident effects of different mechanical processes on the organic acid content(P＞0.05). The pH value of silages was all lower than 4.0 and the ratio of ammonia nitrogen to total nitrogen was all lower than 5.0, which improved the quality that all the silages in experiment were good. Though the effects of three different mechanical processes on the CP, CA and WSC contents of silages were evident, the silages were all excellent. And the fermentation quality and digestibility of the silage processed with cutting and rubbing were the best.