NOVELTY - A high-cleanness environment-protecting diesel oil comprises vegetable oil (18-38, preferably 18.84 pbw), and multifunctional diesel oil additive (0.00000001-0.008, preferably 0.00000002 pbw). The vegetable oil is regenerative vegetable oil refined from a regenerative fuel or a plant residue. The multifunctional diesel oil additive is synthesized from tricarbonyl cyclopentadiene manganese (6-20 pbw), vegetable oil (60-80 pbw), and dimethylaniline (6-20 pbw).    USE - Used as high-cleanness environment-protecting-number 0 diesel oil with international standard.    ADVANTAGE - The high-cleanness environment-protecting diesel oil uses cheap and easy to buy raw materials, has good spectral property, and can be widely applied and spread in large market demand.    DETAILED DESCRIPTION - A high-cleanness environment-protecting diesel oil comprises water (12-30, preferably 13.46 pbw), vegetable oil (18-38, preferably 18.84 pbw), diesel oil (18-36, preferably 33.66 pbw), coal oil (7-15, preferably 10.09 pbw), ethanol amine (1.0-3, preferably 1.7 pbw), n-butylamine (1.0-2.0, preferably 1.34 pbw), ammonia water (1-3, preferably 1.34 pbw), number 200 solvent (6-15, preferably 6.73 pbw), carbon 9 (10-20, preferably 13.46 pbw), cleanser (0.00001-0.04, preferably 0.00025 pbw), multifunctional diesel oil additive (0.00000001-0.008, preferably 0.00000002 pbw), cetane number improver (0.00000001-0.002, preferably 0.00000001 pbw), antioxidant (0.00000002-0.001, preferably 0.00000006 pbw), and anti-icing agent (0.00000001-0.015, preferably 0.00000001 pbw). The vegetable oil is regenerative vegetable oil refined from the regenerative fuel or the plant residue. The raw materials are orderly and proportionally added into a reactor at a normal temperature and pressure, and stirred by wind force or machine for 10-20 minutes. The multifunctional diesel oil additive is synthesized from tricarbonyl cyclopentadiene manganese (6-20 pbw), vegetable oil (60-80 pbw), and dimethylaniline (6-20 pbw).