The invention discloses an internal electrolytic processor for wastewater, which comprises a reaction pool, a water inlet pipe and a water outlet tank, wherein iron powder, activated carbon or iron powder are filled in the reaction pool, and a spiral elevator is arranged in the reaction pool and is used for crushing and elevating the agglomerated iron powder, activated carbon or iron powder in the reaction pool above the reaction pool; and the crushed iron powder, activated carbon or iron powder are put in the reaction pool again. The invention has simple structure, convenient implementation, can solves the problem of agglomeration in the internal electrolysis process and the problem that main energy is absorbed by water in the microwave irradiation process, and is suitable for sewage and wastewater treatment industry.