Cement paste, cement mortar and concrete are the common engineering cement-based materials and its performance is much affected by the internal pore structure. Carbonation can transform calcium hydroxide in the cement-based materials into calcium carbonate, with improving its internal pore structure, so as to improve its performance. Supercritical carbon as a special carbonization conditions, can be accelerated carbonation efficiency. To study the effect of supercritical carbonization, in this paper, the test research has been finished on the change of the strength, carbonation depth and carbon dioxide absorption of the cement-base material under supercritical conditions. It is found that, through accelerated carbonation, the rapid carbonization of cement base material is achieved, the strength of materials is increased sharply, and at the same time a large number of CO2 is absorbing, which has a double meaning on the material performance and environmental protection.