The invention discloses a double-ring vertical self-cleaning electric remediation device and method for in-situ dehydration and pollution reduction. The device comprises pore water collecting rings, cathode protection liquid releasing rings, water-diverting insulating anti-blocking cathodes, inert anodes, cathode protection liquid storage tanks, pore water storage tanks, pH sensors, peristaltic pumps and programmable controllers; the cathode protection liquid releasing rings and the pore water collecting rings are connected through the water-diverting insulating anti-blocking cathodes, the water-diverting insulating anti-blocking cathodes are arranged around the inert anodes, capillary water-diverting filtering pipes are arranged in the water-diverting insulating anti-blocking cathodes, the cathode protection liquid releasing rings communicate with the pore water collecting rings through the capillary water-diverting filtering pipes, the pore water collecting rings and the cathode protection liquid releasing rings are connected with the peristaltic pumps, and the peristaltic pumps communicate with the pore water storage tanks and the cathode protection liquid storage tanks; and thepH sensors are installed in the pore water storage tanks, and the pH sensors and the peristaltic pumps are connected with the programmable controllers. According to the double-ring vertical self-cleaning electric remediation device and method for in-situ dehydration and pollution reduction, with the intentions of maximumlly diverting and discharging pore water and separating out pollutants, electrode blocking and enrichment of pollutants of cathode regions are reduced.