Cotton fiber is widely recognized as a liquid product, and its demand in the global market continues to grow annually. To meet this rising demand, an increase in cotton fiber production is necessary. In saw ginning, a significant portion of the energy consumed is attributed to overcoming the frictional forces between the raw roller and the inner surface of the working chamber, as well as the forces required to separate fibers from seeds. This study aims to analyze how the friction coefficient of cotton fiber changes when it contacts a heated steel surface. As part of this research, a novel device was developed to measure the friction coefficient of natural fibers on a steel surface. Existing designs and methods for determining friction coefficients were reviewed, and their primary limitations were identified. Our goal was to create a device capable of measuring the friction coefficient of fibrous materials at various surface temperatures, which could be applied in designing an improved working chamber for saw gins. This would enhance energy efficiency and product quality. The resulting device was used to investigate how temperature affects the friction coefficient of fibrous materials as they move along a steel surface. Experimental data revealed numerical values for the friction coefficient based on the moisture content of raw cotton and the temperature of the steel surface. Results showed that as the surface temperature increased from 80 ℃ to 100 ℃, the friction coefficient decreased from 0.6 to 0.46. This indicates that higher temperatures lead to increased raw roller rotation speeds.