Abstract: Coal seam gas content is coal mine gas basic parameter, and the accuracy of gas content measurement affects the design and safety of mine production management, scientific experiments. The paper makes a presentation of the study and application of domestic and international coal seam gas content measurement methods, and focuses on the application of China’s coal seam gas content. It highlights that the calculation of the initial desorption gas loss amount of coal samples exposed is inaccuracy as using direct method to collect coal samples in geological survey and underground drilling to determine gas content, and points out the improvements in the collection of coal sample.