Silver nanowires(AgNWs) are synthesized by the solvothermal method, in which the molar ratio of PVP and AgNO3 and the molar ratio of Cl- and Ag+ are changed respectively to study their effect on lengths and diameters of silver naowires. It is found that only when the molar ratio of PVP and AgNO3 is 4.5∶1 accompanied with a molar ratio of Cl- and Ag+ fixed at 2∶85, the AgNWs possess the characteristics of appropriate length，diameter and well-dispersibility, which is suitable for conductive films. The highest figure of merit of the obtained film is 24, which is higher than that of indium tin oxide (ITO), 9. The flexibility of the AgNWs film demonstrates its potential application in flexible devices including organic photovoltain(OPV) and orgnic lightemitting diode(OLED).