Abstract: In this paper, graphite oxide was first prepared by the Hummers’ method, and then reduced graphene oxide (RGO) was obtained by ultrasonic exfoliation and thermal reduction. The resulting RGO was used as an antistatic agent to prepare the polyurethane-based composites, and the effect of RGO on the antistatic properties of the composites was investigated. The results indicated that RGO has a thin, transparent and amorphous structure, and the addition of RGO reduced the electrical resistivity of the composites significantly. The electrical resistivity was found to decrease with an increase of RGO content and was lower than 1010 Ω·cm at a RGO content of 1 wt%. Moreover, the composites achieved a fair improvement in compressive strength.