Abstract: Based on such cases that large oil tank being repaired under the site management in recent years, this article analyses and evaluates the following four points in tank repairing management with the consideration of technical condition, repairing design and construction progress for old type oil tank. These four points are: 1) disassembling the edge plate at tank bottom and replacing the edge plate and some wall plate; 2) considering how to repaire the edge plate of oil tank, 3) renovating the floating roof; and 4) treating the bottom plate of oil tank