In order to endow microporous polypropylene membrane (MPPM) antibacterial capability and improve MPPM surface hydrophilicity, AgCl modification layer was fabricated on MPPM via dopamine oxypolymerization and alternate soaking technique. The chemical change of the membranes in the fabrication process was analyzed by FTIR and XPS. Surface morphology and AgCl distribution of the membranes were investigated by SEM-EDX. Surface hydrophilicity of the membranes was analyzed by the combination of water contact angle and water flux. Antibacterial capabilities of the membranes for E. coli and S. aureus were evaluated via plate counting method. The results indicated that the modified membranes have strong antibacterial capability and favorable hydrophilicity, their antibacterial rate for E. coli and S. aureus are 99.2% and 100%, respectively.