NOVELTY - Renewable environmentally friendly activated carbon sound absorbing cotton comprises a top surface layer, a backing layer, and a cotton fiber layer mounted between the top surface layer and the backing layer, where the top surface layer and the backing layer are made of non-woven fabric material. The non-woven fabric material includes isotactic polypropylene, hydrogenated rosin glycerin ester, cerium nitrate, manganese nitrate, glycerol triacetate, tetrabutyltin, coconut shell activated carbon, attapulgite, flower of Chinese scholar tree, ramie root, and auxiliary agent.    USE - Used as a renewable environmentally friendly activated carbon sound absorbing cotton.    ADVANTAGE - The method has simple process, uses cheap, accessible and green raw materials, has good controllability, and high production efficiency. The cotton has good flatness appearance, strong sound absorbing effect, large porosity, and tensile performance.    DETAILED DESCRIPTION - Renewable environmentally friendly activated carbon sound absorbing cotton comprises a top surface layer, a backing layer, and a cotton fiber layer mounted between the top surface layer and the backing layer, where the top surface layer and the backing layer are made of non-woven fabric material. The non-woven fabric material includes 100 pts. wt. isotactic polypropylene, 6-9 pts. wt. hydrogenated rosin glycerin ester, 1-2 pts. wt. cerium nitrate, 2-3 pts. wt.manganese nitrate, 14-17 pts. wt. glycerol triacetate, 1-2 pts. wt. tetrabutyltin, 10-12 pts. wt. coconut shell activated carbon, 5-7 pts. wt. attapulgite, 2-3 pts. wt. flower of Chinese scholar tree, 4-6 pts. wt. ramie root, and 4-5 pts. wt. auxiliary agent; the auxiliary agent includes 10-12 pts. wt. clay, 1-2 pts. wt. nano-carbon, 3-4 pts. wt. polytetrafluoroethylene powder, 1-2 pts. wt. antioxidant NBC, 2-3 pts. wt. distearoyl isopropoxy aluminate, 2-3 pts. wt. dialkyl dithiophosphate, 2-3 pts. wt. magnet, 35-40 pts. wt. epoxy soybean oil, 3-4 pts. wt. propyl gallate, 2-3 pts. wt. barley oil, 1-2 pts. wt. vanadium diboride, and 2-3 pts. wt. polyphenol; and the preparation of auxiliary agent comprises adding clay and magnet into the calciner and calcining at 720-740 degrees C for 2-3 hours, removing, soaking in 10-15% hydrochloric acid solution for 2-3 hours, filtering residue, washing with water, drying, and grinding into powder of 400-600 meshes, then mixing the resulting powder with the other remaining ingredients, heating to 60-70 degrees C, stirring the reaction for 40-50 minutes, cooling, and grinding into a paste. An INDEPENDENT CLAIM is also includes for preparing the sound absorbing cotton, comprising (i) mixing flower of Chinese scholar tree and ramie root, crushing into 200-230 mesh powder, blowing the powder, spraying hydrogenated rosin glycerin ester and fully mixing; (ii) adding the attapulgite into a carbonization furnace, carbonizing at 520-630 degrees C for 3-4 hours, taking out, and crushing into powder; (iii) heating isotactic polypropylene into molten state, mixing with the product of step (i) and (ii); and (iv) adding the remaining materials, sufficiently stirring, mixing, and obtaining non-woven fabric by spinning nozzle.