Abstract: In the present study， the initial deposition of chlorfenapyr in broccoli was set as 337 and 506 g·hm-2 to study the residues and dissipation dynamics of chlorfenapyr in broccoli flowers and leaves under both greenhouse and open field conditions. The result showed that the half life of chlorfenapyr in broccoli flowers was 77-173 d，and was 693 d in leaves. According to the maximum residue limits （MRLs） of China，EU and Japan， with the use dosage of 337-506 g·hm-2 and 1 time application，the pre\|harvest interval （PHI） of chlorfenapyr in broccoli flowers was suggested to be 14 d，in order to meet the standards of domestic consumption and exportation to EU. As the residue of chlorfenapyr in broccoli leaves was relatively high and hard to dissipate，broccoli leave was not suggested for consumption with this application dosage.

Key words: Chlorfenapyr, broccoli, dissipation dynamics