Antimicrobial activities of hydrogel burn wound dressing and chitosan were investigated against nine strains of bacteria and fungi, including P. aeruginosa, S. aureus, Enterobacter, P. vulgaris, P. mirabilis, E. coli, Klebsiella, B. subtilis, C. albicans. The results showed that both hydrogel dressing and chitosan have antimicrobial effect and the effect of hydrogel dressing is higher than that of chitosan. Antimicrobial activity of hydrogel dressing in experiment in rabbit was also tested.