Copolymer (PAAS) of acrylic acid (AA), acryloyloxyethyltrimethyl ammonium chloride (AAC) and sodium allylsulfonate (SAS) was prepared by polymerization in order to solve the problem of uniformly dispersity of graphene oxide (GO) nanosheets in cement matrix. PAAS with GO nanosheets forms the PAAS/GO composites achieve the dispersive effects. The tested results indicated that the PAAS/GO composites consisted of PASS with mass fraction of 2% and GO with mass farction of 0.01%, 0.02% and 0.03%, respectively, can regulate the cement matrix to from regulation and order microstructure gathered by flower-like, polyhedron-like and needle-like crystals, respectively. The flexural strength of corresponding to cement materials have an increase of 63.0%, 90.4% and 87.9% at 28 d, respectively, and the corresponding tensile strength have an increase of 32.6%, 74.2% and 71.3%, respectively. These cement hydration crystals usually easily growed in cracks and holes of cement matrix and had repairing function for the cracks and holes. PASS forming the composites with GO nanosheets achieve uniformly dispersion GO nanosheets in cement matrix and effective control the microstructure and properties.