The Baijinbao Site is located in the south of Heilongjiang province, it was occupied from the early IInd millennium BC until the end of the Ist millennium BC. Previous research mainly focused on archaeological cultures and chronological sequences. Based on these researches, this paper uses spatial analysis methods to study a burned house (F3004) in the site. According to the inner space spatial activity-area, spatial divisions and the relationship among the house and other features, it can be inferred that F3004 had both political and daily life functions; and its spatial design favored the protection of privacy. In addition, the analysis shows that F3004 was burned on purpose, which sheds light on the abandonment behaviors of the site.