The moisture content,acid insoluble ash,water extract,heavy metal residues,aflatoxins and pesticide residues of Pubei Chenpi in Qinzhou were determined and analyzed.The results showed that the moisture content was 9.18%~12.88%,the acid insoluble ash content was 0.004 36%~0.113 00%,and the water extract content was 42.08%~59.64%.The contents of arsenic,mercury,lead,cadmium were 0~0.190 mg·kg-1,0~0.004 360 mg·kg-1,0~1.240 mg·kg-1,and 0~0.022 30 mg·kg-1 respectively.No aflatoxin B1,aflatoxin B2,aflatoxin G1,and aflatoxin G2 were detected.Among the 30 kinds of pesticides commonly used in citrus fruits,9 kinds of pesticides were detected in some samples,and all of them did not exceed the reference value.It indicated that the quality and safety index of Pubei Chenpi was higher.