NOVELTY - Method for preparing vegetable bio oil, involves extracting triglyceride by compressing caster seeds and pre-treating the triglyceride, obtaining purified triglyceride through de-acidification after proceeding neutralization reaction, forming glycerol by reacting fat with alcohol using three components azeotrope distillation method, performing pre-esterification of free lipid acid while continuously eliminating water, obtaining bio oil (methyl ester) from the refined triglyceride, and reforming fuel by passing the bio oil through lead-refine.    USE - The method is useful for preparing vegetable bio oil chosen from rapeseed oil, corn oil, soybean oil, cashew nut oil, and castor bean oil which is useful as livestock feed (all claimed).    ADVANTAGE - The prepared bio oil provides minimum exhaustion of pollutants and produces various high value products by recycling by-products.    DETAILED DESCRIPTION - Method for preparing vegetable bio oil, involves (a) obtaining castor seed as renewable energy raw material to produce bio oil, washing, pulverizing, and compressing the castor seed, extracting and adding triglyceride (oil and fat) to refining tank, hydrating phospholipid and gum through mechanical agitation at high temperature, and removing phospholipid, gum, and free fatty acid through centrifugation process and pre-treating the triglyceride, (b) adding and neutralizing alkali solution sodium hydroxide with obtained triglyceride, and reacting with free fatty acid, hydrating by adding nitric acid to oil and fat, removing soap component, metal component, and sulfur component through process of removing color component, and obtaining triglyceride by deacidifying acid from free fatty acid, (c) adding obtained refined triglyceride to distillation tower, composing the distillation tower with two continuous distillation towers, installing 220-350 V ceramics type infrared ray heaters and ceramic balls, irradiating infrared ray in each distillation tower, activating oil and fat molecule, methanol molecule, and water molecule, and preparing glycerol by reacting fat or oil with alcohol by three-component azeotrope distillation method by two-tower azeotropic evaporation principles at 60-70 degrees C using methanol, (d) processing esterification at 200-250 degrees C, installing zeolite ceramic ball which is a strong dehydrating agent absorbing water well at bottom of the second distillation tower during the reaction process for high computation, continuously removing generated water, and processing free fatty acid esterification using superheated methanol, (e) changing obtained triglyceride refined step (b), (c), and (d) steps into fatty acid alkyl ester and glycerol through esterification (glycerol sinks in reactor), preparing diglyceride and monoglyceride as intermediates, preparing ester and glycerol by mixing and reacting with methyl alcohol, heating at 900 degrees C for 1-2 hours using alkali catalyst (sodium hydroxide) to prevent absorption of carbon dioxide and remove glycerin, and obtaining bio oil (methyl ester) through free fatty acid esterification, and (f) adding obtained bio oil (methyl ester) to final refining tank, installing lead-refine which is fuel improving device at both sides of an oil pipeline delivering to oil reservoir, subdividing and homogenizing fuel molecules by the principles of radio frequency magnetic field rotation and promoting bonding with oxygen molecules while the oil passes through the lead-refine, reforms fuel by increasing fuel reaction, and improving energy efficiency. An INDEPENDENT CLAIM is included for method for preparing protein livestock feed, which involves crushing the obtained bio oil waste to 100-200 meshes sieve, drying the crushed waste products, adding castor, rice straw, wheat straw and corn stalks, and sterilizing the mixture.