Antibacterial absorbable wound suture and preparation method thereof

The invention discloses an antibacterial absorbable wound suture and a preparation method thereof.The wound suture is prepared by conducting cross-linking treatment on modified polyglycolide, starch and chitosan to obtain composite particles, and then conducting blended spinning on the composite particles, silver nitrate and ammonium bicarbonate; the matrix molecules of the wound suture are of a crossed three-dimensional grid structure, so that the toughness of the wound suture is enhanced, meanwhile, the toughness of the wound suture is further improved through crosslinking with starch, in the electrostatic spinning process, ammonium bicarbonate is heated to be decomposed to generate carbon dioxide, air holes are formed in the surface of the wound suture, and the wound suture has certain medicine carrying capacity; meanwhile, the wound suture can be bent by extruding air holes, so that the flexibility and the elasticity of the suture are improved, the suture is prevented from tightening and injuring new tiss