Abstract:After analyzing the reasons of sesame paste sedlmentation during a long time store， the effect on stability of sesame paste of the addition methods and the emulsifier ratio had been researched. The emulsification effect of sucrose ester compound with monoglyceride was better than it of the separate use， ratio of sucrose ester and monoglyceride for 2 ∶ 3 was the best， and the light transmittance of the emulsion was 68.3 % . The emulsification effect was the best when the mass ratio of composite emulsifier and grease in sesame paste was 3.50 %， and the light transmittance of the emulsion was 72.1 %. Grind sesame to paste after adding composite emulsifier to the sesame. The ascents exponent （0.01 %） of the paste was low， the stability of it was high and the color of it was claybank. There is no oil perspiring phenomenon after a 100 d store. But paste becomes gray when composite emulsifier was added to the paste directly， the ascents exponent （0.11 %） of the paste was large and the stability of it was poor. The phenomenon of oil perspiring and sedlmentation comes out after a 60 d store.