Disclosed is a special detection tool for a heater. The special detection tool comprises a shell, wherein a pressing handle is arranged in the bottom of the shell; one end of the pressing handle is hinged to the shell through a first rotating shaft, and the other end of the pressing handle penetrates out of the shell through a through groove; a tension spring is further arranged on the pressing handle near the first rotating shaft; one end of the tension spring is fixedly connected with the pressing handle, and the other end of the tension spring is arranged on the shell; and an arc-shaped rack driving block is fixedly connected to at the position, far away from the first rotating shaft, of the pressing handle. The tool disclosed by the invention has the positive effects that the hidden danger that the operation and maintenance personnel mistakenly touch the operation equipment is avoided, and the safety distance between the operation and maintenance personnel and a heating sheet can be ensured by using the special detection tool for the heater, so that the hidden danger of scalding is avoided, and personal safety is ensured; in the measurement process, the measurement data can beread from a display screen as long as point contact is completed; and the tool is convenient and rapid, simple and practical, and has relatively high precision.