The use of hydroxylated graphene (HO-G) modified cement-based permeable crystalline waterproof materials (CCCW) not only improves the mechanical properties of whole structure, but also reduces the cost to a certain extent. The effect of sodium lignosulfonate(SL) on the dispersion performance of HO-G was studied, and the influence of HO-G on the mechanical properties of CCCW was studied. The results show that when the mass ratio of HO-G to SL is 1∶4, HO-G has the best dispersion performance in Ca(OH)2. When HO-G content is 0.03% (mass fraction), compared with benchmark specimen, the 3 and 28 d compressive strength of HO-G mortar specimen increases by 3769% and 3305%, respectively and the 3 and 28 d flexural strength increases by 17.31% and 31.52%, respectively. The impermeability pressure ratio of CCCW coating specimens modified by HO-G is 127 percentage points higher than that of CCCW coating specimens alone. SL promotes the dispersion of HO-G in cement-based materials, and HO-G plays a filling role and template role in mortar matrix, which enhances the compactness of hydration products, and then improves the mechanical properties of material.