Abstract: ObjectiveTo observe the synergetic virucidal effect by low amperage direct currennt(DC)and free chlorine (FC)for poliovirus Type(PV1)in water.MethodsWater samples polluted PV1 was treated by 0.4-1.2mA·cm^-2 LDC and 0.2mg·L^-1 FC.Inactivation efficacy was estimated by comparing inactiv ation rates K value and morphologic changes were observed under trasmission electron microscope(TEM).ResultsThere was synergetic effect of inactivating viruses by DC amounting to 1.2 mA·cm^-2 or abov e in combination with 0.2mg·L^-1 FC,and synergetic inactivation was significant difference in comparison with FC alone(P<0.05).Under TEM viral gathering grain tended to deco ncentration after treated by DC.ConclusionDCmight enhance vir ucidal effect of low level chlorine for poliovirus Ⅰ Type in water.