Abstract: The experiment investigated 953 organic fertilizer samples in Zhejiang Province during 2009-2013. The results of investigation showed that average content of As， Hg， Pb， Cd and Cr in organic fertilizer samples was 9.53，0.42，31.8，1.25，71.0 mg.kg-1，respectively， which was below standard criteria. But the heavy metal contents in some samples exceeded standard requirements. The excessive percentage of As， Hg， Pb， Cd and Cr was 8.3%， 2.3%， 9.0%， 3.9%， 5.2%， respectively. There were two reasons for the presence of high heavy metal content in organic fertilizers. One reason was that heavy metal contents in raw material were out of limits. Another was that the raw materials were not accord with the standard. In order to ensure the quality and safety of organic fertilizer， we proposed some corresponding measures.

Key words: Zhejiang Province, organic fertilizer, heavy metal