Protective device for circular knitting machine

The utility model provides a protective device for a circular knitting machine, and relates to the technical field of textile, the protective device for the circular knitting machine comprises a supporting column, an adjustable sliding rail is arranged below the supporting column, the adjustable sliding rail is formed by splicing a plurality of small sliding rails, the adjustable sliding rail is connected with a connecting rod in a sliding mode, and the connecting rod is connected with the supporting column. The connecting rods are connected with the adjustable sliding rails in a sliding mode, a diaphragm used for isolating the outside is arranged between the connecting rods, a connecting assembly is arranged between the connecting rods and the supporting column, a supporting frame is fixedly installed on the top of the supporting column, and a top cover is arranged on the supporting frame; when the protective device is used, the size of a protective area can be adjusted by adjusting the number of the adjusta