The invention relates to a threaded rod structure of a squeezing drying granulator. The treaded rod structure of the squeezing drying granulator comprises a machine barrel and a threaded rod arranged in the machine barrel in a penetrating manner. The threaded rod is composed of a conveying segment threaded rod body, a material piling segment threaded rod body and a squeezing drying segment threaded rod body. The diameter of the squeezing drying segment threaded rod body is larger than that of the conveying segment threaded rod body. The conveying segment threaded rod body is provided with equal-diameter first spiral blades. The squeezing drying segment threaded rod body is provided with equal-diameter second spiral blades. The spiral interval of the first spiral blades is larger than that of the second spiral blades. According to the treaded rod structure of the squeezing drying granulator, by means of the difference of the conveying capacity of the three segments of threaded rod bodies, lots of recycled plastics are accumulated in a material piling segment threaded rod area and a material squeezing segment threaded rod area, by means of squeezing between the plastics and friction between the plastics and the inner wall of the machine barrel, most of water is filtered out, the dewatering efficiency is greatly improved, the plastifying effect of a rear segment heating device is better, and therefore the requirement for direct granulation is met.