The invention relates to an experiment apparatus for researching adsorption equilibrium characteristics of coal gas in front of a working face. The experiment apparatus comprises a first pressure gauge, a connecting pipe, a cover, a cuboid container, a gas injection system, an ordinary inflating system, a gas content test system, a colloid injection system, a measuring point configuration system and an experiment coal sample; before the determination is began, the gas inside an inner shell can enter and exit freely, the equilibrium of a whole system gas flow field can be ensured, and the gas pressure inside the inner shell is consistent with the gas pressure monitored by virtue of a steel pipe; after the determination is began, the gas inside the inner shell can be completely sealed for along time, and the leakage of the gas can be avoided in the gas content determination period; and therefore, the gas pressure and content of all measuring points can be simultaneously acquired. Therefore, the coal sample gas adsorption equilibrium characteristics of each point can be determined, the distribution condition of the coal gas adsorption equilibrium characteristics in front of the working face can be finally drawn, and a scientific method can be provided for accurately controlling the coalbed gas occurrence in front of the mining face.