Graphene nano-sheets and its derivatives have been applied in many areas including electronics, optics, and bio-devices. Recently, a novel application is to use them in cementitious materials. In this presentation, a short review on recent research results about graphene oxide (GO) modified cement-based materials was made. The review mainly discussed the influence of GO on properties of cementitious materials in term of cement hydration, mechanical properties, etc. Furthermore, good dispersion of GO in cementitious materials is critical in achieving the enhancement of these nano-sheets. Up to now, commercial superplasticizers such as sulfonated naphthalene formaldehyde condensates or polycarboxylates are used as dispersing agents of GO nano-sheets. In our lab, we have prepared a new dispersion agent. Compared to commercial superplasticizers, the prepared dispersant shows better dispersion property in pore solutions, and the resulting GO-contained mortars exhibit greater compressive strength and flexural strength.