Abstract: OBJECTIVE To study the antiviral effect of Qingpeng capsule．METHODS Applied cell culture technique to study the antiviral（influenza virus A3 and B）effect of Qingpeng capsule in vitro on passage cell. RESULTS Qingpeng capsule was effective in neutralize and treatment for influenza virus A3,but no effect for influenza virus B. CONCLUSION Qingpeng capsule is effective in neutralize and treatment for influenza virus A3.