The invention discloses a spinning dust collecting device for a spinner. The spinning dust collecting device comprises a supporting frame, a first electric push rod, a dust removal pipe, an induced draft fan, a movable box, a second electric push rod, a push block, an infrared receiver, a first filter net, a second filter net, an infrared transmitter, a high-pressure nozzle, a timer and a PLC. Supporting legs are fixedly welded to the periphery of the bottom of the supporting frame, and the bottoms of the supporting legs on the two adjacent sides are connected through a fixing plate, a plurality of fixing bolt holes are formed in the fixing plate, an electric control box is fixedly arranged on the supporting legs through bolts, a control board is installed on the electric control box, the timer and the PLC are installed inside the electric control box, the inner walls of the two corresponding sides of the supporting frame are connected through a sliding rail, and a servo motor is fixedly arranged on one side of the top of the sliding rail. The spinning dust collecting device is convenient to use, easy to operate and capable of removing dust conveniently, improving the dust removal effect and avoiding secondary pollution.