Abstract: The study summarized the main factors affecting alfalfa silage and the current research situation on alfalfa silage technology in the world, in which additives silage technology is the future direction and focus of the study. Because of the high moisture, low soluble sugar, high buffer index and few lactic acid bacteria of alfalfa, it needed to be treated specially for silage making. Low moisture silage technology of alfalfa was used early, and now additive silage technology developed fast, but there was still a long way to practice. Finally, there was a outlook for alfalfa additive silage.

Key words: alfalfa silage; influencing factor; progress