Practice has proven that organic silicon quaternary ammonium salts have excellent antibacterial and bacteriostatic properties. Studies have shown that when used for cotton fabric finishing, the antibacterial rates against Staphylococcus aureus, Escherichia coli and Candida albicans reached 98.12%, 96.86% and 95.14% respectively after 24 hours, showing broad-spectrum antibacterial effect and antibacterial effect. High efficiency, safe and non-toxic, no enzymatic reaction. Huang et al. [3] studied the adsorption performance of polysiloxane with side groups of benzyldimethylsilylpropyl ammonium chloride on cotton sheets and its bactericidal activity against Escherichia coli and Staphylococcus aureus. The results show that its bactericidal activity is very strong. Japanese patents report the use of trimethoxysilane-substituted isocyanuride compounds, trimethoxysilane containing C10~30 quaternary ammonium groups and CH2Cl2 as finishing agents to treat polyester fabrics. After heat treatment at 100°C for 10 minutes, the fabric can have excellent antibacterial properties and washing resistance. Organosilicon quaternary ammonium salt is a new type of cationic surfactant that is resistant to high temperatures, washable, long-lasting, and has a wide antibacterial range. It can effectively inhibit Gram-positive bacteria, Gram-negative bacteria, yeasts and fungi. Its bactericidal mechanism is to use silicone as a medium to adsorb ammonium cationic groups with bactericidal properties on the surface of bacteria, changing the permeability of the bacterial cell wall, causing the enzymes, coenzymes and metabolic intermediates in the bacteria to overflow, causing the microorganisms to stop breathing and die. In this way, the purpose of sterilization and bacteriostasis is achieved, that is, "contact death" occurs.