The invention discloses a marking tool for an infrared-thermal detection test position. The marking tool for the infrared-thermal detection test position comprises a bottom plate, a rotary shaft arranged on the bottom plate, a sleeve nested onto the rotary shaft, an azimuth bar connected to the sleeve, a cantilever connected to the upper end of the rotary shaft, a paint spraying box arranged belowthe cantilever, a grip arranged below the cantilever, a pressing handle fixed to the grip, and a transmission mechanism arranged on the cantilever, wherein the transmission mechanism comprises a first connection rod, a second connection rod, a spring, a pull line and a line pipe; and angle graduated lines, anti-slide reticulated patterns and hollowed-out semi-circles are formed on the bottom plate. The marking tool is used for marking the infrared-thermal detection test position, and is simple in structure and convenient to use and carry; the marking tool can be used for permanent spraying for the mark of the detection position, and short-time marking for the detection position; and the marked graphs are uniform and normative, and clear and beautiful, the errors of the marked position andangle are effectively reduced, and comparison for detection results is benefited.