Abstract: With the increasing of oil product's class, quantity of oil tank is increasing, thus more land is required. The article puts forward a plan for design segmented vertical metal oil tank to save land area on the base of reasonable layout. During hydraulic test, stress loads generated from inner split plate, outer wall deformation, wall plate reinforced bar and tension bar made the plan unsatisfied. There exists such problems as low utilization, inaccurate metering and inner leakage. Thses shortcomings can be overcome by means of adopting segmented tank in tank form so as to make the segmented oil tank design plan more applicable.