NOVELTY - Co-generating biodiesel, vitamin E and sterol with plant oil comprises: (a) degumming: heating plant oil; (b) methyl esterification: calculating theory methanol dosage according to the content of triglyceride and free fatty acid in plant oil; (c) washing; (d) cold separation: coldly separating materials; (e) dehydration: dehydrating coldly separated materials; and (6) molecular distillation: performing four-grade molecular distillation, where at stage two, biodiesel is obtained, at stage three, distillate is returned to stage two for re-distillation, and at stage four, vitamin E is obtained.    USE - The process is useful for co-generating biodiesel, vitamin E and sterol with plant oil (claimed).    ADVANTAGE - The process is simple, has decreased production cost, and has improved economic effect.    DETAILED DESCRIPTION - Co-generating biodiesel, vitamin E and sterol with plant oil comprises: (a) degumming: heating plant oil at 80-95 degrees C, adding 80-95 degrees C water with dosage of 10-30 wt.% of plant oil dosage, stirring, mixing, separating oil foot and oil; (b) methyl esterification: calculating theory methanol dosage according to the content of triglyceride and free fatty acid in plant oil, where the actual adding dosage is 3-7 times of theory dosage, adding concentrated sulfuric acid as catalyst, where the dosage is 3-20 wt.% of methanol dosage, stirring and refluxing at 65-85 degrees C, reacting for 2-6 hours; (c) washing: adding water into the materials, where the dosage is 1-5 times of the weight of methanol dosage, laying, delaminating, removing mixed phase of low layer glycerol, methanol, water, sulfuric acid, washing with 80-98 degrees C hot water for 1-3 times until it becomes neutral; (d) cold separation: coldly separating washed materials, stirring, quickly cooling at negative 5-5 degrees C, preserving temperature for 5-20 hours, separating out most sterol, washing separated sterol with acetone, drying, obtaining white sterol product; (e) dehydration: dehydrating coldly separated materials in 400-2000 Pa vacuum at 95-115 degrees C; and (6) molecular distillation: performing four-grade molecular distillation to dehydrated material at different temperature and vacuum comprising grade one of negative 0.05 to negative 0.00 MPa at 100-115 centigrade, grade two of 5-150 Pa at 130-180 degrees C, grade three of 0.5-5 Pa at 150-170 degrees C and stage four of 0.5-5 Pa at 170-190 degrees C, where at the stage two fatty acid ester as biodiesel is obtained, at stage three, distillate is returned to stage two for re-distillation, and at stage four, natural vitamin E is obtained.