Present study concentrated on the preparation of combined Mannich base with magnetic nano particle by condensation method. Various techniques were employed to confirm the formation of mannich base. The base is combined with magnetic nano particle and used to treat the phenolic effluent like o- cresol, 2-chlorophenol, 2, 6-dichlorophenol. Mannich base alone give 80.75% of removal after 4 days, when it mixed with magnetic Nanoparticle the result are remarkable it gives 94.14% removal in 1hr.