Abstract: It has been found that Tamarix can migrate and reside naturally in nonriver-bank region of desert. The necessary conditions for the plant to germinate are: big rain fall, which leads to waterlogging in growth season, suitable soil structure and the seed source. These conditions are seldomly satisfied in Xinjiang at the same place and time, thus the seedling group is very rare, and the age distribution is uncontinuous. On the other hand, the bush wood usually has a long life. Without artifical disturbance, these bush woods will regenerate by filling up the seedling continuosly.