A one-step resistance reduction process of polymer solution at room temperature was developed, and hydroxyethyl cellulose (HEC) solution was coated on the surface of bare silver nanowire electrode to prepare cellulose-silver nanowire composite transparent electrode. The surface morphology and properties of the electrodes were characterized and tested by SEM, AFM, UV-Vis, etc. The results showed that the initial sheet resistance of the electrode (transmittance of 87.7%) is reduced from 27 Ω·sq-1 to 14 Ω·sq-1 after coating the surface of the bare silver nanowire electrode with 0.50% HEC solution, while having little effect on light transmittance. Meanwhile, the nanofilm formed by the HEC solution reduced the electrode surface roughness. The composite electrode exhibited excellent chemical stability in the 12 day accelerated degradation test, and its resistance changed by 1.35 and 1.45 times, respectively, in 2400 internal and external bending tests, which was much smaller than that of the bare silver nanowire electrode.