The utility model belongs to a technical field that pressure vessel made specifically is a measuring tool of head height. A measuring tool of head height, includes the disk spirit level, has placed the tripod on the disk spirit level, has inserted high lift chi in the center hole of tripod, the competent extensible beam of end connection of high lift chi, and infrared range finder is installed to extensible beam's free end. The utility model discloses compare with traditional measuring technique and have obvious advance, design to the drawback of head height measurement in -process, changed the stability of measuring the base to the design has the ball in the crossbeam, makes the crossbeam can stretch out and draw back portable. The measured data's of the infrared range finder assurance of tip accuracy nature. This tool design is advanced, simple structure, and it is reasonable to set up, is the measuring tool of head height of very ideal.