The effects of initial high humid aircuring, standard watercuring and sealedcuring on thaumasite form of sulfate attack (TSA) of cementbased materials were studied.The Erosion products after 180 days attack in sulfate solution were analyzed by the way of Xray diffraction(XRD) and fourier transform infrared spectroscopy(FTIR).And it was found that the TSA of the cement stone was delayed in high humid air resulting from that CaCO3 generated from carbonation was filled in the pores of the specimens, forming a compacted surface and restricting SO42- intrusion.In comparison, the extent of TSA of the specimens cured in sealed condition was most severe resulting from that large amount of interdefects in specimens for the lower hydration degree, and SO42- ions could intrude into specimens more easily.