Abstract: The analysis and research on all possible factors and influence degrees of the groundwater dynamic change of building site is the important foundation of the security, economic and reasonable building groundwater level for prevention of up-floating. In this paper, to research and analyze various influence factors on the building groundwater level for prevention of up-floating, to discuss the effects of various factors on the predicted groundwater level dynamic change rule, development trend, the basal groundwater head pressure and the groundwater level for prevention of up-floating value of building.