Silver nanowires（AgNWs）were prepared by atmospheric drip route and hermetic-solvothermal route respectively to enhance the aspect ratio of classic polyol method products. The effects of reaction time，reaction atmosphere and reactant feed ratio on the yield and aspect ratios of AgNWs were discussed in detail. The AgNWs growth process was more eco-friendly and less disturbances in hermetic-solvothermal route.The AgNWs products show that an average diameter of approach 55 nm and length of about 65 μm and a high aspect ratio of about 1 200. The transparent conductive film fabricated by hermetic-solvothermal AgNWs exhibit sheet resistance of 6 Ω at 78.6% transmission of 550 nm and a factor of merit（FOM） of 246,better than that of atmospheric drip route.