The utility model discloses a coal sample tank for infrared promotion gas desorption. The coal sample tank comprises a tank body and a tank cover arranged at a top opening of the tank body, wherein a gas opening capable of being connected to a gas pipe is formed in the tank cover; an infrared emission instrument is arranged in the tank body; a wire outlet hole is formed in the bottom of the tank body; a wire of the infrared emission instrument extends out of the tank body from the wire outlet hole. According to the coal sample tank, disadvantages of an existing coal sample tank for infrared promotion gas desorption during the promotion experiment of gas desorption are overcome, and the provided novel coal sample tank is simple in structure and good in sealing effect, and can promote gas desorption by utilizing infrared rays to directly act on a coal sample.