Based on the experience summary of the contrast,design and operation of the water purification proce-ssof fuel ethanol engineering in Jilin City,it isconcluded that the technology of vortex coagulation and low pulse deposition,which isinvented in accordance with the theory of submicroscopic masstransfer inertial effect,isthe optimum one suitable for water purification processof fuel ethanol engineering.It hasthe featuresof lower investment,smaller space occupied,lower running cost and better outlet water quality