Bacteriostatic composition and application thereof in bacteriostatic laundry detergent

The invention discloses a bacteriostatic composition and application thereof in bacteriostatic laundry detergent. The bacteriostatic composition which is microencapsulated is prepared by using p-methyl phenylacetaldehyde and/or p-methoxy phenylacetaldehyde to prepare low-molecular-weight chitosan quaternary ammonium salt and using the low-molecular-weight chitosan quaternary ammonium salt, soybean extract and olive leaf extract for preparation. The bacteriostatic composition has good antibacterial effect on Gram-negative bacteria, positive bacteria, moulds and saccharomycetes and plays a role in coordinated bacterium inhibition and sterilization, and bacteriostatic effect is improved; the bacteriostatic composition is high in stabilizer, lasting in bacteristatic effect and suitable for being applied in preparing the bacteriostatic laundry detergent.