This experiment studies the electrolysis as a pretreatment of wastewater degradation of trichlorfon results discussed in detail electrolysis, pH wastewater electrolysis voltage, current electrolysis in the electrolyte and adding content on the effect of electrolysis. Experimental results showed that the electrolytic cell cycle, wastewater pH = 6 ~ 8, the 30 V voltage conditions, Wastewater degradation rate of 40.00%. Under the same conditions, adding electrolyte NaCl 10 g·L-1 100 mL, Wastewater degradation rate can be achieved 42.80%.