The invention relates to an infrared calibration device for a directional ray machine. The infrared calibration device comprises a machine head fixing rack, a fixing connecting piece, a vertical baffle, a rotating bracket, an infrared fixing rack and an infrared lamp, wherein the head fixing rack is a component for connecting a ray head and the rotating bracket, and the machine head fixing rack can be flexibly changed to be matched with different directional ray heads; the infrared rotating part is vertically positioned by dual measures of positioning balls and the vertical baffle. The rotating bracket is a component for connecting the machine head fixing rack and the infrared lamp, and has rotatable and vertical fixing functions, and the bracket is provided with a plurality of positioningballs. The infrared fixing rack can fix the infrared lamp and is fixed with the rotating bracket. The infrared calibration device for the directional ray machine provided by the invention is modularly produced, different brands and models of directional ray machines can be used, the versatility is strong, standard products are used for consumable parts, and the daily maintenance is convenient. The fast and accurate focusing when the industrial directional X-ray machine works is realized.