To investigate the thermal decomposition behavior of ［Cd(CHZ)₃］(ClO₄)₂ (CdCP),the T-jump/FT-IR spectroscopy was used to determine the main gaseous products evolved from the thermolysis of CdCP in real time. CdCP was flash-pyrolyzed at 200 ℃·s^-1 to the set temperature under different pressures. With the help of rapid scanning Fourier transform infrared FT-IR spectroscopy,11 IR-active gas products were resolved during the flash pyrolysis process. The change curves of the concentration of the main gaseous products vs. time were given,indicating that over the range of pressure from 1.0 to 15 atm,the thermal decomposition behavior of CdCP does not seem to be obviously affected by the pressure.