Abstract: The experiments of pectin extraction from Yizhou Chaenomeles sinensis were carried out by the hydrochloric acid extraction method and the ethanol deposition method.Results showed that the extraction rate of pectin is higher when the pH of extraction solution was around 2.0,the extraction temperature was 80 to 90℃,the ratio of extraction solution to material was around 4,and the extraction time was 1 to 1.5 h.On the base of single factor test,the orthogonal test was used for optimization of technological parameters.The optimal technological conditions are pH value 2.0,temperature 90 ℃,extraction solution-material ratio 4,and time 1 h.

Key words: Yizhou Chaenomeles sinensis, pectine, extraction, single factor test, orthogonal test