The invention discloses an enhancement type electrodynamic force in-situ soil remediation device which comprises a flexible cathode, a flexible anode and a direct-current power source. The flexible cathode is placed in a groove in one side of soil to be remedied, and the flexible anode is placed in a groove in the other side of the soil to be remedied. The flexible cathode and the flexible anode are connected with the direct-current power source. The grooves where the flexible anode and the flexible cathode are located each contain an electrolyte, and the liquid level of the flexible anode is higher than that of the flexible cathode. The hydraulic gradient and the intensity of a direct-current electric field are adjusted, and therefore the rate of migrating the anode H+ to the cathode can be remarkably increased, and the removal efficiency of contaminants in the soil can be improved. Acid and salt are added into the electrolytes, and therefore the electric conductivity and pH values of the soil, an anode bath solution and a cathode bath solution can be improved, electrode polarization can be reduced, the heavy metal dissolution rate can be increased, and energy consumption can be reduced. The enhancement type electrodynamic force in-situ soil remediation device is especially suitable for remediation of low-permeability soil, paddy fields and other farmland soil hard to treat through other methods.