In this paper,the effects of irradiation time,original concentration of pyridine solution,and pH on the degradation efficiency of pyridine were studied.The results show that the longer the sonication time is,the greater the degradation efficiency of pyridine solution;the degradation efficiency of pyridine solution decreases linearly with the increase of the original solution concentration;the pH of the solution played an important role,and there is a good degradation efficiency at pH≥68;the conductivity and the degradation efficiency have the same variational trend.