The invention relates to the field of water treatment, and especially relates to a reinforced horizontal flow artificial wetland treatment system with the advantages of difficult obstruction, good decontamination capability, good intercepting effect and long persistence. The reinforced horizontal flow artificial wetland treatment system comprises a first stage ecological pool and a second stage ecological pool, an energy conversion assembly and an aeration device are arranged in the first stage ecological pool, a reaction wall is arranged between the first stage ecological pool and the second stage ecological pool, sewage in the first stage ecological pool goes through the reaction wall and penetrates the second stage ecological pool, the system also comprises a clear water pool, water in the second stage ecological pool enters the clear water pool through a water pumping system. The above design of the reinforced horizontal flow artificial wetland treatment system considers the plant effect and also considers nitration-denitrification and adsorption to reinforce the plant effect, so the decontamination capability is improved, the liquidity of the artificial wetland treatment system is improved, the obstruction phenomenon of the system is avoided, and the service life of the system is prolonged.