Abstract: Due to the current state of ozone layer depletion and plastic pollution, researches on cellulose-based films with ultraviolet (UV) blocking properties has attracted widespread attention. In order to realize the uniform dispersion of UV absorbent (lignin) and cellulose, a method of using high pressure homogenization to achieve mixing of lignin particles and carboxymethylated fibers was proposed. Then lignin-cellulose nanofiber(Lignin-CNF, L-CNF) composite film was fabricated through vacuum filtration and hot pressing process. Moreover, the micro-morphology of the L-CNF composite film was observed and the forming process was determined. At the same time, the influence of different lignin additions on the light transmittance, UV light blocking performance, and surface color value (L*a*b* value) of the composite films was investigated. The results reveal that, with the increase of lignin additions, the light transmittance of the composite films at 600 nm decreases, while the UV-blocking efficiency at the bands of UVA (320-400 nm) and UVB (280-320 nm) increase significantly. Besides, when the amount of lignin reaches 12wt%, the L-CNF composite film still maintains a light transmittance of 40%, and the UV-blocking efficiency in the UVA and UVB bands reaches 98% and 100% respectively, exhibiting an excellent UV shielding performance. Overall, the L-CNF composite film with different performances can be obtained by adjusting the ratio of lignin, which shows high potentials in photosensitive material coating and food packaging materials.