The invention discloses a cotton carding machine, the structure of which comprises a conveyor, a frame, a cotton feeding machine, a control panel, an internal device, the conveyor and the frame are welded, the conveyor, the frame and the cotton feeding machine are installed and connected, the control panel Installed on the cotton feeding machine, the cotton feeding machine is installed and connected with the internal device. The internal device is composed of a material feeder, a carding roller, an ejector, and an upper feeder. The material feeder is installed and connected with the carding roller, and the carding roller is connected with the ejector. Fitting, the ejector is installed on the feeder, the feeder includes a blanking structure, a bulk material structure, a material transfer structure, and a feeder frame, and the blanking structure and the transfer structure are installed and connected. 1. Carding roller carding, and then feeding from the upper feeding machine through the top device, the roller needle moves on the rotating roller to loosen the cotton and reduce the cotton residual rate. The fine and short fibers are thoroughly extracted to avoid the mixing of cotton fibers, and there is no need to increase the lifting process to process them when receiving materials, so as to avoid damage to parts due to lifting.