NOVELTY - Preparation of biologic diesel comprises: (1) preparing mixed esters by putting crude oil into reactor, dispersing solid multi-phase alkali catalyst in mixed alcohol, adding into crude oil, heating, cooling, filtering, separating glycerine and crude mixed ester, evaporating and purifying; (2) selectively oxidizing by adding three-way catalyst composite, connecting hydrogen, controlling iodine value and stopping reaction; and (3) filtering whole composition comprising addition, low temperature flowing improving and dispersion agents and fatty acid mixed ester, mixing and filtering.    USE - Preparation of biologic diesel for industrial applications    ADVANTAGE - The process uses recycled heat energy with energy efficiency 17% better than traditional method. The process allows continuous production. Catalyst cleaning does not need neutralization and alcohol used is mixed alcohol. The high performance biologic diesel oil product has heat value near that of petroleum diesel oil, discharging reaches Europe IV level, has good storing stability, low solidifying point and can meet the requirements of top grade automobile and special device.    DETAILED DESCRIPTION - Biologic diesel is prepared by: (1) preparing mixed esters of methyl, ethyl and butyl by mixed ester exchange under supercritical condition, 230-370 degrees C comprising taking crude oil as material, putting into reactor, dispersing 0.3-0.5 % solid multi-phase alkali catalyst in at least 1:4 mixed alcohol comprising methanol, ethanol, butyl alcohol, adding the catalyst with mixed alcohol into the crude oil, heating to 230-370 degrees C and 8-32 Mpa for 5-18 minutes, cooling, filtering, separating out glycerine and crude mixed ester, evaporating and purifying the mixed ester to obtain fatty acid mixed ester formed by methyl oleate, ethyl oleate or butyl oleate or combination; (2) selectively oxidizing by adding three-way catalyst composite comprising copper, chrome and manganese at 0.02-0.15 % fatty acid mixed ester at 80-120 degrees C for 15-20 minutes, connecting hydrogen when pressure is 0.4-1.3 MPa, controlling the iodine value at 90-97, stopping the reaction; and (3) filtering whole composition to prepare high performance biologic diesel oil by taking the fatty acid mixed ester as base oil at 50-60 degrees C, adding 0.1-0.3% carbonic acid group rare-earth lanthanum cerium polyatomic alcohol oleic acid ester multi-polymer as function addition agent, and taking the 0.7-10 % 12-14C alkane as low temperature flowing improving agent, and taking 1-4 % butyl or isobutyl alcohol or both as dispersing agent, mixing for 10-15 minutes and filtering. An INDEPENDENT CLAIM is given for preparation of multi-phase alkali catalyst by compounding.    DESCRIPTION OF DRAWING(S) - The drawing shows flowchart of the process (Drawing includes non-English language text).