The invention relates to a flocculation device and especially relates to a flocculation device for sludge treatment of a printing and dyeing industry. The technical problem to be solved by the invention is to provide the flocculation device for sludge treatment of the printing and dyeing industry that can thoroughly mix sludge with flocculation auxiliaries. In order to solve the technical problem, the flocculation device for sludge treatment of the printing and dyeing industry provided by the invention comprises a stirring box, a rotating mechanism, a plurality of first rotating rods, a plurality of first stirring rods, a drug box and a drug draining device, wherein the rotating mechanism is connected with the middle part on the upper side in the stirring box; the first rotating rods are uniformly connected with the bottom of the rotating mechanism; the first stirring rods are uniformly connected with the first rotating rods; the drug box is connected with the top of the stirring box; the drug draining device is connected with the bottom of the drug box. According to the invention, the rotating mechanism is arranged for driving the first stirring rods to rotate and the first stirring rods are driven to rotate by the first rotating rods so as to achieve the purpose of stirring and mixing the sludge and the flocculation auxiliaries.