▎ 摘　　要

NOVELTY - Flame-retardant antibacterial agent, comprises graphene oxide, phosphoric acid, guanidine phosphate and an aqueous solvent, where the concentration of the graphene oxide is 8-10 mg/ml, the concentration of the phosphoric acid is 56-112 mg/ml, and the concentration of the guanidine phosphate is 65-77 mg/ml. USE - The flame-retardant antibacterial agent is useful on cotton fabric (claimed). ADVANTAGE - The agent: has flame retardant performance, antibacterial rate on Escherichia coli and Staphylococcus aureus to reach more than 99% and high limiting oxygen index of 47.8%. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a preparing the flame-retardant antibacterial agent, comprises mixing the graphene oxide solution, phosphoric acid and guanidine phosphate to obtain the final product, a flame-retardant antibacterial cotton fabric, comprising flame-retardant antibacterial agent; and a preparing a flame-retardant antibacterial cotton fabric, comprising preparing a aqueous flame-retardant antibacterial agent containing graphene oxide, phosphoric acid and guanidine phosphate, pre-treating the surface of the cotton fabric and coating the flame-retardant antibacterial agent on the surface of the pretreated cotton fabric and drying to obtain the final product.