Thermo-sensitive materials with different phase transition temperature were synthesized with methyl cellulose(MC), N-Isopropyl acrylamide(NIPAM), methacrylic acid(MAA) and Acrylic amide(AM). The kinetics of moisture absorption/release was studied using batch adsorption/desorption experiment. The thermal decomposition temperature and the structures of the samples were characterized using TG-DT and FTIR, respectively. And the effects of low critical solution temperature (LCST) of thermo-sensitive materials on the moisture absorption/release of humidity-controlling composite material were discussed. Results showed thatthe desorption rate of materials increased with the decrease of LCST of thermo-sensitive materials. The composition material with NIPAM and MC had the fastest rate of release moisture, more than 95% of adsorpted amounts desorpted in 10 minutes at 80 ℃.The organic-inorganic thermo-sensitive phase change material was prepared by MC and CaCl2, and it had a high capacity of moisture absorption of 1.45 g/g at RH（reletive humidity）= 100%, and all materials had good thermal stability under 300 ℃.
