Abstract: In order to study the effect of reduced graphene oxide (RGO) on the properties of chitosan (CS) films, graphite oxide and CS were used as raw materials to prepare reduced graphene oxide-chitosan film (RGO-CS) by ultrasonic dispersion and vacuum induced self-assembly and various properties of the film was characterized in this paper. In addition, CS and RGO were used as surface sizing agents to study the effects on the water resistance of corrugated paper. The results show that: the RGO-CS film was successfully prepared. SEM images reveal the surface of the RGO-CS film is flat and smooth. Besides, GO-CS composite film has the highest resistivity (17310 mΩ·cm), while resistivity of the RGO-CS film is only about 52.7 mΩ·cm. Using RGO-CS and RGO as additives to coat corrugated paper, compared with the blank sample, it is found that the water resistance is significantly improved. The sizing degree reached 78 s and 74 s, and the maximum contact angle reached 112° and 110°, respectively.