Carbon pillared MMT was prepared from Na-MMT modified by acrylamide. The structural behavior of the MMT and AM/modified MMT were characterized by TG-DTA and DSC. The analysis of modified MMT showed that: the lamellar structure of carbon pillared MMT increases clearly with the carbonization temperature. In the experiment temperature range, the higher the heating temperature, the more significantly carbonization properties of MMT exhibited, and the more apertures of Pillared MMT developed. In the test MMT lamellar spacing of the carbide change with the heating treatment temperature, d001 value of the MMT augmented to the largest when carbonization temperature reach 200°C; the average pore size of treated MMT was larger than untreated MMT, the pore size became the largest average at 400 °C.