In order to study the anthocyanin composition of‘Pingguoli’and the content changes of anthocyaninin ‘Pingguoli’ after bagging, HPLC was used to test the anthocyanin content in ‘Pingguoli’. The results showed that three anthocyanin and their contents in the pericarp of ‘Pingguoli’ were successfully measured. Cyanidin-3-O-galactoside in pericarp of ‘Pingguoli’ accounted 90% of the total content,the content of cyanidin-3-O-glucoside is little and the content of peonidin-3-O-galactoside chloride is the least. Moreover, the pericarp of bagged ‘Pingguoli’ was obviously colored, and the anthocyanin content was much more than that of the control group.