GC-O(gas chromatography-olfactometry) is an effective analytical tool for food flavor compounds detection,it can discriminate active and non-active odor in a multitude of volatiles and evaluate their contributions to the overall flavor profile of the sample.There are fewer applications currently in the domestic.This article focuses on the analysis methods,the influence factors and its solutions as well as the applications of GC-O.It provides a better understanding of GC-O techniques for flavor compounds detection.