Self-leveling mortar(SLM) was prepared by mixing Portland cement, sulpho-aluminate cement and other chemical additives.The effects of cementation system, different mineral fillers and different chemical additives on the properties of SLM were studied;the hydrated products of different binder systems and micro-structures of hardened pastes were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and other characterization methods.The results show that sulfur cement content of 10% can effectively shorten the setting time of cementitious materials and improve self-leveling mortar early strength, but when sulfur cement content reaches a certain value, the late strength retraction will be caused by it.Since the late hydration gel mixed system generates more net ettringite crystals, they can effectively fill the gaps and voids within the cement structure, making the cement structure is more compact, and ultimately improves the contractile properties of cement-based self-leveling and strength properties.