The effect of temperature and carbonization on the chloride binding stability of calcium aluminate cement （CAC） was investigated by comparing the amount of binding chloride， pH value of soaking solution， composition and morphology of Fs samples， which were obtained by four common chloride-bound hydration products（CAH₁₀， C₂AH₈， C₃AH₆ and NO₃-AFm） of CAC， before and after high temperature and carbonization. The results show that high temperature has great impact on the physical binding chloride instead of chemical binding one. Carbonization causes Friedel's salt to dissolve， forming calcium carbonate products dominated by calcite， thus increasing the content of free chloride in the pore solution. Chloride-bound Fs（CAH₁₀） and Fs（C₂AH₈） exhibit relatively better resistance to carbonization.