Objective: Al icin obserbation of dysentery bacil us antibacterial effect,and preliminary discussion of al icin antibacterial mechanism. Methods: Adopts K-Bpaper method,liquid dilution method to, detect al icin for dysentery bacil us antibacterial effect and the minimum inhibition concentration.Results: Al icin for dysentery bacil us of bacteriostatic ring diameter is 15.3±1.676305mm,MIC is 100ug/ml;In the SDS-PAGEAl icin action, dysentery bacil us protein map have change. Conclusion:Al icin for dysentery bacil us has bacteriostatic action, and influence somatic protein synthesis, preliminary reveals the mechanism of action of al icin.