The invention relates to a dustproof thread guiding roller device of a kitting machine, comprising a connecting rod, a thread guiding roller assembly and a dustproof cover. The connecting rod is provided with a free end and a connecting end; the thread guiding roller assembly is rotatably arranged at the free end of the connecting rod and comprises a thread guiding roller, an upper lining, a lower lining and a locating sleeve; and the dustproof cover is fixed on upper part of the thread guiding roller assembly. The connecting end of the connecting rod is connected with a yarn feeding rod of the kitting machine. The thread guiding roller assembly can rotate around the connecting rod under the action of yarn and can be disassembled from the connecting rod. The dustproof thread guiding roller of a kitting machine can effectively reduce wool, avoid aggregation and winding of wool on the thread guiding roller, and prevent wool or dust from entering the thread guiding roller, which is easy to be disassembled and replaced.