Online recovery treatment device for chemical waste liquid

The invention relates to the technical field of chemical waste liquid recovery, in particular to a chemical waste liquid online recovery treatment device which comprises a shell and a water inlet pipe fixedly connected with the shell. The filtering mechanism is arranged on the inner side of the shell and is in sliding connection with the water inlet pipe; the purifying mechanism is arranged between the filtering mechanism and the shell; wherein the purification mechanism comprises a purification assembly, and the purification assembly is arranged on the inner side of the shell in a sliding connection mode; a gas injection assembly is driven; the connecting assembly is arranged between the driving gas injection assembly and the purification assembly, by arranging the filtering mechanism and the purification mechanism, waste liquid can be purified multiple times, in the process that the purification assembly conducts secondary purification on the waste liquid, the driving gas injection assembly is matched with