A combined yarn carrier guiding device of a knitting machine belongs to transmission devices of knitting machines. The combined yarn carrier guiding device comprises an upper plate, a mandrel, a lowerplate, a rotary sleeve, guide blocks, a guide block supporting plate, a guide block bottom plate, roller shafts and rollers. The upper plate and the lower plate are connected with both ends of the mandrel, and the rotary sleeve which can rotate freely is sleeved on the mandrel between the upper plate and the lower plate. Two holes are formed on the lower plate, and the guide blocks which can rotate freely is arranged in the holes. The guide blocks are supported on the lower plate by the guide block supporting plate to prevent the guide blocks from falling off from the lower plate. The rollershafts are arranged in the guide blocks, and the rollers which can rotate freely are arranged on the roller shafts. The guide block bottom plate is connected with the bottom of the guide blocks, and the guide block bottom plate fixes the roller shafts in the guide blocks. The device has the advantages of simple structure, simple processing, high yield, short processing cycle, high reliability, improved production efficiency, reduced production cost, and easy replacement.