The utility model relates to a tool used for preparing an internal guiding pole of an infrared detector belonging to the infrared detector technology field. The tool comprises vacuum tweezers and a fixing device. By using the tool, the the technology operability of the golden slurry internal guiding pole can be improved, and the qualified rate and the reliability of the detector provided with the improved technology can be greatly improved. The tool can be used to fix a thermistor slice, and the production efficiency and the reliability of the infrared detector can be improved. The tool also can be used to fix slice-shaped objects having small sizes, thin thickness, and weak strength, and has a wide application prospect. The tool has advantages of simple operation, high efficiency, and ability of fixing thermistor slices effectively. The detector using the tool has advantages of high yield, and long-term stability, and strong practicability.