Organosilicon quaternary ammonium salt antibacterial agent and preparing method thereof

The invention discloses an organosilicon quaternary ammonium salt antibacterial agent and a preparing method thereof. The chemical formula of the organosilicon quaternary ammonium salt antibacterial agent is RnSiO4-n.CmH 2m+(n-2) Ok+(n-4), wherein R represents an alkyl group which can not be hydrolyzed, the molecular formula of the alkyl group is R1NMe2R2, R1 represents one of an alkyl group and an aryl group, Me represents a methyl group, R2 represents C1-C5 linear-chain alkyl groups, n is a positive integer from 1 to 3, m is a positive integer from 5 to 8, and k is a positive integer from 3 to m+1. The organosilicon quaternary ammonium salt antibacterial agent is low in inflammability and free of toxicity, has high water solubility and stability, is convenient to store and easy to transport, and has no toxic and side effects on the environment and the human body, and antibacterial mould-proof products and skin care products containing the organosilicon quaternary ammonium salt antibacterial agent can be used conveniently and safely for a long term.