Abstract: It is a challenge to load silver nanoparticles uniformly and stably on the surface of materials and improve their antibacterial properties. In this study, we prepared nanosilver-porous polymer composite materials using nanosecond pulsed discharge pretreatment and chemical impregnation post-treatment. The porous polymer materials before and after modified and the distribution of silver nanoparticles on the surface of the porous polymer materials were analyzed using atomic force microscope, scanning electron microscopy and X-ray photoelectron spectroscopy. At different discharge treatment time, pulse peak voltages, and silver nitrate concentrations, the antimicrobial properties of the porous polymer materials before and after nanosilver loading were tested using escherichia coli and candida albicans as test strains. It was found that the composite materials obtained by impregnation in 10 mmol/L of silver nitrate solution under modification time of 20 min and peak pulse voltage of 30 kV still had a high bactericidal rate, and it was 99.3% and 98.9% for Escherichia coli and Candida albicans at an action time of 5 h, exhibiting excellent antimicrobial effects.