In the process of textile production, high or low temperature will easily lead to brittle breakage of cotton fiber, produce static electricity and affect the drawing process. What’s more, high or low relative humidity will cause short fleece become more and lower yarn strength in the process of spinning. Temperature also has an effect on the conductivity of the fiber. Generally speaking, the conductivity of the fiber increases with the increase of temperature. Therefore, according to the physical properties of cotton fiber to choose the appropriate temperature and humidity is the premise of spinning high-quality yarn products.