A series of transparent conductive silver nanowire films with different concentration parameters and sheet resistances are prepared by the spin coating method. By the adjustment of the process parameters, the prepared films have high optical transmittance and good uniformity in the optical spectrum range of 400-10,500 nm. The influence of concentration parameters on the photoelectric properties of films is analyzed. The analysis indicates that when the concentration of silver nanowires is greater, the networks built between the silver nanowires are denser, and the effective conductive paths of the films increase, which improves the conductivity of the films. When the mass concentration of silver nanowires is 1.0 mg/mL, the film has high optical transmittance in visible and infrared spectrum bands, with the sheet resistance of 106.1 Ω/sq. To reduce the sheet resistance of the transparent conductive silver nanowire films, this paper performs thermal annealing treatment on the films, and the nodes between silver nanowires are welded by increasing the temperature, which reduces the contact resistance between silver nanowires and improves the conductivity of the films. Through the thermal annealing treatment of the films, the sheet resistance of the films is reduced from 106.1 Ω/sq to 49.5 Ω/sq when the optical transmittance of the films changes slightly.