Abstract: Provided is a self-consistent resourceful treatment apparatus and self-consistent resourceful treatment method for salt-containing wastewater and hydrochloric acid-containing waste gas, which belongs to the technical field of industrial wastewater and waste gas treatment. In the method, the salt-containing wastewater and hydrochloric acid-containing waste gas are simultaneously charged into a self-consistent absorption and precipitation reactor for self-consistent absorption reaction; NaCl crystals are gradually precipitated from the salt in the salt-containing wastewater by a common ion effect to obtain a solid-liquid mixture which is subjected to settling and separation to obtain the industrial-grade salt and industrial-grade hydrochloric acid.