Abstract: The wild pollinators play an important role in improving forage seed production. In order to master the type and activity patterns of the pollination insects, and supply the guidance of alfalfa seed production. In 2011, the kinds of pollination insects were surveyed on alfalfa flowering in Xinjiang Agricultural University ecological stations of Hutubi. The results showed that: there were about 18 species of pollination insects during alfalfa flowering, which belonged to 18 families of 6 sections. Apoidea was the most stable and the major of pollination insects. From 14 to 16th on June, which were the fastigium of pollination insects to pollinate alfalfa flower, which the types and the number of pollination insects were mostly. In a day, from 13 pm to 16 pm, the pollination insects were more frequently.