Abstract: Aneurolepidium chinense is an excellent forage grass in China. The seed production of its population in different environmental conditions with artificial interference and some regularities in the quantitative change of its seed production is reported in this paper. The density is one of the limitation factors of the earing percentage of its population. The earing percentage decreases with the increase in density, assuming a power function y=dx-b in a short-term mowing plot of 604.7+147.6 stems per square metre, which is medium density, and a linear function y=a-bx in a 1ong-term mowing plot of 1640.9+104.6 stems per square metre, which is great density. The germinating percentage has a close positive correlation with 1000-seed weight. Grazing decreases the earing percentage but promotes the process of dry-matter accumulation in the seed. Long-term repeated mowing is harmful to the process of the entire sexual development of the population and even after mowing is stopped, the natural recovery of seed production is slow.