Abstract: In order to study the gas desorption characteristics of coal samples collected by sealed sampling, according to the sealed sampling procedure, the gas desorption process was divided into the diffusion stage, the sealed desorption stage, and the atmospheric natural desorption stage. Gas desorption experiments of coal samples collected by sealed sampling were conducted, and the variation characteristics of cumulative gas desorption and desorption rate were analyzed. The results showed that: ① In the sealed desorption stage, with the increase of adsorption equilibrium pressure, both the cumulative gas desorption and the initial gas desorption rate increased. However, with the continuous isochoric variable-pressure desorption, the gas desorption capacity was limited, the gas desorption rate gradually decreased, and the cumulative gas desorption gradually tended to be stable. ② In the atmospheric natural desorption stage, with the increase of adsorption equilibrium pressure, both the cumulative gas desorption and the initial gas desorption rate gradually increased. Due to the influence of free gas desorption in the sealed desorption stage, the initial gas desorption rate at this stage was higher than that in the sealed desorption stage. With the increase of desorption time, the cumulative gas desorption gradually tended to be stable. ③ The Sun Chongxu equation well described the gas desorption characteristics in the atmospheric natural desorption process. The desorption indicator increased with the increase of adsorption equilibrium pressure, while the desorption exponent basically remained stable under different adsorption equilibrium pressures, indicating that coal samples collected by sealed sampling had stronger desorption capacity under higher adsorption equilibrium pressure, and the variation of gas desorption rate was basically consistent under different adsorption equilibrium pressures.