In this paper, the commercial crude oil reserve base project of Caofeidian was taken as the study subject. Based on the characteristics of the project, vibro-replacement stone piles were selected to reinforce the storage tank foundation. Due to the hydraulic pressure and vibro-flotation disturbance and the other causes, part of the pile-soil composite foundation was observed of large settlement, which did not meet the design requirements. The reinforcement measures with sinking pipe stone piles were adopted. It was proved that the foundation treatment method by the sinking pipe stone pile reinforcement can eliminate the insufficiency bearing capacity issue of the in-situ consolidated foundation and it is an economical and reasonable reinforcement method for the foundation.