Synthetic pyrethroid insecticides have become one of the three major kinds of pesticide residues in the exported vegetabes and fruits in China nowadays. They also caused more and more acute or chronic poisoning affair and do great damage to human beings, aquatic biology and natural environment. As an efficient way to remove pesticides pollution, the biodegradation of pesticides has gradually become the hot issue in the field of environmental sciences. The study on the separation of degrading-bacteria and the extraction, purification, mechanism and immobilization of the degrading-enzyme of pyrethroids is reviewed in this paper. And the problems under resolved in the future work are also prospected.