The heat source body is installed in a double-hole quartz tube. There is a gold-plated layer on the back of the double-hole quartz tube. The gold-plated layer on the back of the double-hole quartz tube reflects infrared rays, improves the thermal energy utilization rate of infrared radiation heating, and prevents radiant energy from going to Internal diffusion avoids high-temperature heat dissipation energy consumption, thereby reducing thermal energy consumption, improving thermal efficiency, obtaining wide-spectrum infrared radiation, and better heating effect. Infrared heaters made of it are widely used in printing and dyeing, textile, tobacco and other industries. Compared with ordinary quartz far-infrared heaters, they can save 50%-60% of electricity.