A type of anti rust oil for equipment preservation was developed by using mixed base oil and calcium sulfonate as the main anti rust inhibitor, which can meet the anti rust requirement of preserving sea equipment parts in highly humid and highly salty environment. The cooperating effect of different kinds anti rust inhibitors was observed by orthogonal experiments. The performance of this prepared anti rust oil was evaluated comprehensively.The results show that the prepared anti rust oil possesses excellent anti rust property,and its corrosion resistance is much better than that of a kind of import product.The anti rust oil can be applied for the long term preservation of sea equipment parts.