Abstract: In order to explore the different characteristics of pectin from Premna microphylla Turcz leaves in different months,seek the reasons for the uneven quality of "leaf jelly" in different months,and improve the application value of pectin,the principal component analysis method was used to evaluate the yield rate,main components,viscosity average molecular weight,emulsifying properties and gel properties of pectin in different months(from May to October)in this paper. The results showed that the pectin yield rate was ranged from 4.24% to 18.24%,the percentages from May to September were higher than 15%. And the galacturonic acid content was from 73.73% to 81.96%,the content was higher from June to September. The viscosity average molecular weight increased with the month from May to September,and decreased in October. The obtained pectin powder was pale yellow from May to August and pale yellow with grayish white in September and October. Emulsifying activity and emulsifying stability were higher than 50%,which was superior to the orange peel pectin standard. There were significant differences in gel properties and gel performance of pectin from July to September was better. The order of the comprehensive score from high to low was September > July > August > October > June > May,indicating that the quality of pectin varied greatly from month to month,and the pectin from Premna microphylla Turcz leaves from July to September was more suitable for the extraction and utilization,since the comprehensive score was higher obviously than other months.