The invention provides a binding agent. The binding agent is prepared from 5-28 grams of collagen hydrolysate, 9-14 grams of silicon dioxide, 16-29 grams of silicon dioxide, 6-8 grams of polypropylene, 1-3 grams of ethyl acetate, 8-21 grams of ethyl alcohol, 4-16 grams of trimethylbenzene, 4-7 grams of whiting, 4-15 grams of chlorinated polyethylene, 1-6 grams of high density polyethylene, 8-11 grams of poly (p-phenyldimethyl alcohol), 5-8 grams of magnesium stearate, 7-19 grams of ferric oxide, 7-21 grams of copper chloride and 8-21 grams of zirconium sulfate. The binding agent has the advantages that the zirconium sulfate is added, the binding effect of the binding agent can be significantly improved, energy is saved, the consumption is reduced, the use is more convenient, the cost is lower, and the binding agent is attractive in price and quality.