Abstract:This paper concentrate on GLSPs， the optimum process parameters of extracting GLSPs were deter－ mined through single factor experiment， in which the three factors that influence the extraction yield of GLSPs （including the ratio of water to material， the extraction temperature and the extraction time） were controlled and tracked. At the same time， the response surface method was used to optimize the three factors and lead to the optimized extraction process as well as to determine the reliability and efficiency of this optimized process con－ ditions.The single factor experiments showed that the optimized process of extracting GLSPs was as follows： the ratio of water to material was 20 ∶ 1（mL/g）， the extraction temperature was 80 ℃ and the extraction time was 2 hours. Under such condition， the extraction yield of GLSPs was 4.78 %； By using the response surface method to optimize the process parameters， the optimized process of extracting GLSPs was as follows： the ratio of water to material was 21.27 ∶ 1 （mL/g）， the extraction temperature was 80.10 ℃ and the extraction time was 2.10 hours. Under such condition， the extraction yield of GLSPs was 4.84 %； To verify this model， the measured re－ sult was 4.81 %， and the developed regression model could experimental data well and was qualified.