Abstract: The effect of electrochemical treatment for fosfomycin sodium pharmaceutical wastewater using RuO₂/Ti as anode was investigated. The influences of temperature, NaCl concentration, initial pH and electric current on the degradation of COD_Cr and organic phosphorus were studied in details. The results showed that under the conditions of reaction temperature 80 ℃, concentration of NaCl 0.2 mol/L, initial pH 3.42 and electric current 4.0 A, the concentration of COD_Cr and organic phosphorus could degrade from 12 086 and 1 375 mg/L to 4 278 and 502 mg/L, with the removal rates of COD_Cr and organic phosphorus being over 64.7% and 63.5%, respectively. The biodegradability of wastewater was improved significantly with the BOD₅/COD_Cr ratio increasing from 0.19 to 0.34.