In this paper,by taking a cement- based infiltration crystallization coating and a silane- based coating asresearch objects,the influences of water- to- cement ratio,concrete substrate’ s moisture condition and painting timeson the carbonation resistance of the concrete with infiltration coatings were investigated.The results show that (1)infiltration coatings help to improve the carbonation resistance of concrete to a certain degree,and the carbonationresistance of cement- based coatings is usually stronger than that of silane- based coatings; (2) moist concrete sub-strate is most favorable to the carbonation resistance of cement- based coatings,but it has little effect on that ofsilane-based coatings; (3) with the decrease of water- to- cement ratio,the improvement of carbonation resistance ofthe concrete with infiltration coatings degrades; and (4) more painting times benefits the carbonation resistance ofconcrete with silane- based coatings but has no obvious effect on that with cement- based coatings.