This paper reports the application of a carbon dioxide laser as a new type of pyrolytic source in pyrolysis gas chromatography (PGC).Since the carbon dioxide laser energy can be absorbed directly by transparent or translucent organic compounds, it overcomes the inherent difficult in pyrolysis which ruby or neodymium glass laser has met. A number of qualitative and quantitative data of pyrograms shows that the carbon dioxide laser PGC is a useful technique for the investigation of polymers and other non-volatile organic substances. This technique has been used successfully in our laboratory to characterize polymers for last few years.