A method for removing pollutants by using a mixed microbial solution of beneficial microorganisms to enhance electrokinetic force. It includes a mixed microbial solution; an anode tank and a cathode tank are connected to an external power supply. A soil tank contains contaminant soil and the soil tank is positioned between the anode tank and the cathode tank which are parallel to each other. A soil-retaining net is disposed over the soil. The external direct current is used to allow the mixed microbial solution to transfer in the soil tank.