This paper analyzes the phytolith of 14 samples collected in 2018 at the Qingqiu mound site.Through the materials from the houses,we analyze and discuss the subsistence pattern of the households in the Longshan period,and then explore the form of social organization during the Longshan period.During the Longshan period,the site showed the combined agricultural pattern of rice and drought farming.The houses were mainly made of adobe in layers,and the crop processing was carried out on a household basis,which indicated that the household-based model of social organization pattern was gradually formed at that time.