The utility model discloses vehicular oil burning boiler and tail inert gas purification equipment, which comprises an oil burning boiler and a gas purification device, which are communicated by a chimney. The oil burning boiler consists of a light oil box, a crude oil box, a digital control burner and a central backflash three-pass oil burning boiler and sufficiently burns crude oil, and the gas purification device comprises a condenser, a settlement water tank, a manual air valve, a spray device, a draught fan, a zirconium oxide layer, a fire arrestor, a soft water tank and the like and is used for purifying tail gas. By using the vehicular oil burning boiler and tail inert gas purification equipment, through purifying the tail gas burned by the oil burning boiler, the purified tail gas is used for replacing burnable gas in an oil storage tank; a special nitrogen making device is not needed any more; the cost is reduced; the heat energy of the oil burning boiler heats water for cleaning the oil tank; an energy source is sufficiently utilized; meanwhile, the tail gas burned by the boiler can be recycled; the pollution of the tail gas to the atmosphere is decreased; and the equipment uses a vehicular container structure, is convenient to transport, and is convenient to move and use between each station and the oil tank.