The N—Cl type haloamine antibacterial agent has high-efficiency, fast, stable, safe, and renewable antibacterial properties. The antibacterial materials developed by it are widely used in medical and health, textile, water filtration and other fields. However, during the application of the N—Cl type haloamine antibacterial material, the action of ultraviolet light will break the N—Cl bond on the material or the covalent bond between the antibacterial agent and the material matrix, resulting in a decrease in the content of active chlorine, which in turn causes a decrease in its antibacterial performance. How to improve the UV stability of halamine antibacterial materials has attracted the attention of scholars at home and abroad. This paper first describes the types of N—Cl halamine antibacterial agents and the two factors that cause the decrease of the chlorine content; then, it reviews the research on improving the UV stability of the halogen amine by changing the structure of the halogen amine precursor and introducing nano-TiO2, nano-ZnO, AgCl inorganic particles and organic UV absorbers; finally, the problems and challenges faced by the institute are discussed, and its future development trend is prospected.