The utility model discloses a guide rod applied to fiber production process and is characterized in that the guide rod adopts a pi-shaped structural form. A limit rod is respectively arranged at the bottom and on two sides of a horizontal rod body, and the guide rod is made of glass. The guide rod can meet production requirements of fiber strands on the aspects of hardness, cleanness and corrosion resistance and the like, can effectively improve operation rate of devices, and keeps production continuity and quality stability of as-spun fiber.