The invention relates to a turbine differential submerged desulphurization, denitration, heavy metal removal, dedusting and demisting integration technology, and belongs to the technical field of environmentally-friendly device waste gas treatment. An apparatus for enforcing the technology comprises an integral tower, an ash water precipitation tank, a desulfurizer supply system, a denitration agent supply system, a DCS control system and a later treatment system; and the integral tower mainly comprises a top cover, a main cylinder body, an inverted cone-shaped ash hopper, a smoke inlet tube, a turbine differential submerged mechanism and a dehydrating and demisting mechanism. The technology is used for comprehensively treating various pollutants in smokes discharged from various boilers, kilns, thermal power plants and steel plants, has a high efficiency, can treat mists generated by boiler fire coals to promote that the PM2.5 value reach the standard, and also has the advantages of investment saving, low cost, energy saving and discharge reduction.