Orthogonal test was used to evaluate the effects of synthetic such as temperature(120～140℃),reaction time(4-6)and substrate molar ratio of methyl oleate to sucrose(8:1-12:1)on the percent quantity conversion to sucrose polyester.Sucrose polyester was synthesized by a solvent-free one-stage interesterification.The optimum reaction conditions are as follows:methyl oleate/sucrose =10:1(mol/mol);reaction temperature is 140℃ ;reaction time is 5 hours.The product yield reaches 88.15%,and the degree of esterification(DE)is over 7 in the conditions.Thin layer chromatography(TLC),column chromatography(CC),High-performance liquid chromatography(HPLC)were used to analyze the product,the results show that the percent of sucrose polyoleate is over 70% in the product.The physicochemical properties of sucrose polyesters were compared with cooking oil.The results show that the qualities of sucrose polyesters are all up to the triglyceride. Orthogonal test was used to evaluate the effects of synthetic such as temperature (120 ~ 140 ℃), reaction time (4-6) and substrate molar ratio of methyl oleate to sucrose (8: 1-12: 1) on the percent quantity conversion to sucrose polyester. Sucrose polyester was synthesized by a solvent-free one-stage interesterification. The optimum reaction conditions were as follows: methyl oleate / sucrose = 10: 1 (mol / mol) hours. The product yield reached 88.15%, and the degree of esterification (DE) is over 7 in the conditions. Thin layer chromatography (TLC), column chromatography (CC), High- performance liquid chromatography product, the results show that the percent of sucrose polyoleate is over 70% in the product. physicochemical properties of sucrose polyesters were compared with cooking oil. The results show that the qualities of sucrose polyesters are all up to the triglyceride.