In this study,cationic starch was used to adjust the surface negative charge of lignin and bleached kraft softwood pulp fiber to achieve their in-situ binding with high efficiency,and successfully prepared lignin submicron particles-containing antibacterial fiber. The antibacterial fiber was completely prepared from renewable and degradable raw materials by simple method,with the lignin retention rate more than 92％,and the lignin deposition rate on fiber could reach up to 27.9％. The antibacterial measurement showed that antibacterial fi-ber had broad-spectrum antibacterial effect. When the concentration of antibacterial fiber (calculateed by Lignin)in the bacteria solution was 2 mg/mL,the antibacterial rate against Escherichia coli,Staphylococcus aureus and Staphylococcus epidermidis was 71.2％,86.0％ and 89.2％,respectively.
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