The development of oil chemical industry and biodiesel industry has caused a large amount of excess glycerin as a by-product. It has become a hot research and development area of oil chemical industry to develop deep processing products of glycerin and improve the added value of glycerin. Glycerol carbonate is an important link in the downstream product chain of glycerol, and its molecule is bipolar structure. It can not only be used as a new multifunctional synthetic material to synthesize downstream derivatives, but also as a component for the preparation of surfactants and stain remover, as well as an important solvent in the coating industry, which has very considerable industrial application value.   At present, the synthesis methods of glycerol carbonate mainly include phosgene, carbonylation, urea alcoholysis and transesterification, etc. The conversion rate and selectivity of glycerol carbonate have different degrees of problems. In the synthesis of glycerol carbonate, the yield of Glycerol carbonate and the conversion of glycerol are important indicators to evaluate the quality of the synthesis process. Gas chromatography is widely used at home and abroad for analysis, but the conventional treatment before the analysis is to purify the synthesized crude Glycerol carbonate first (remove the catalyst and evaporate the excess reaction solvent). However, it is inevitable that some components in the product will be lost in the purification process, thus affecting the accuracy of the analysis results. The laboratory staff of our company determined the contents of Glycerol carbonate and glycerol in crude glycerol carbonate products by gas chromatography, which improved the simplicity and accuracy of the analysis and was a supplement to the theoretical research of glycerol carbonate.