Oil distillation system

The invention relates to an oil distillation system. The device comprises a reaction system which comprises a dehydration tower, a distillation tower, an adsorption tower, a catalytic tower, a fractionating tower, a cooling tower, a receiving tank, a combustor and a water supply system, a control valve I, an oil outlet pump and a control valve II are connected in series on the pipeline between thedistillation tower and the dehydration tower; wherein the cooling towers comprise a cooling tower I, a cooling tower II and a cooling tower III which are respectively connected with a top oil outlet,a side oil outlet and a bottom oil outlet of the fractionating tower, and the water supply system is respectively connected with water inlets and water outlets of the cooling towers and supplies coldto the cooling towers; the receiving tank comprises a top line receiving tank, a side line receiving tank and a bottom line receiving tank which are connected with the cooling tower I, the cooling tower II and the cooling towe