This paper focuses on the effects of Perfluorooctyltriethoxysilane (PFOTES) on the workability, anti-icing properties and microscopic properties of cementitious materials, and the composition of the chemical and physical phases of the cement hydration products was also investigated by TG-DSC and XRD. The results show that: the incorporation of PFOTES can prolong the setting time of cement paste. The improvement effect on ice adhesion and contact angle is more obvious at low dosing, and both ice adhesion and contact angle remain basically the same with further increase of dosing. The water absorption and compressive strength of PFOTES modified mortar decrease with the increase of dosing. It is proved by microscopic tests that PFOTES delays the hydration of cement but did not produce new hydration products.