Put the raw materials processed on the cotton gin or carding machine flat on the washboard, then push the lower washboard into a fixed position (the side of the lower washboard of the cotton ironing machine is fixed), start the motor, and the upper washboard will be pushed to move in any direction of 360 degrees, put down the upper washboard until it hits the cotton wadding, run for a few seconds, turn over and run for a few seconds, and then finish the kneading of the cotton wadding. The rail-type cotton kneading machine is also equipped with a drawer-type cotton spreading plate, which is very convenient for stretching and pulling out the cotton spreading table. When the upper washboard, carriage and transmission system are lifted in place, safety bars should be inserted at both ends of the cotton ironing machine to prevent accidents.