The invention discloses a refining technology of byproduct HCl in a F32 device. The refining technology comprises the following steps of cooling, separating, adsorbing, drying and re-rectifying, so asto simultaneously produce two specifications of products with purity of 99.9% and 99.9999%, solve the current problem of production of fluorine-containing waste acid by the byproduct HCl in the priorart, and fully utilize the resources. The invention also provides refining equipment of the byproduct HCl in the F32 device. The refining equipment comprises a HCl separating unit, an adsorbing and drying unit and a finished product rectifying unit, and has the advantages that the production of waste acid and emission of waste gas in the whole process are greatly reduced, and the environment-friendly effect is realized; by additionally arranging a charge pre-cooler, the finished product is cooled by the produced low-temperature product, so that the energy-saving effect is obvious; the deviceis dry without water, the corrosion is avoided, and the DCS (distributed control system) remote control type is adopted, so that the safety and reliability are realized; the high-purity material is obtained by rectification, the added value is high, the byproduct can be recycled at high efficiency, and the important meaning is realized.