Device for displaying potential sweat fingerprint by utilizing temperature difference

The utility model relates to the field of criminal investigation detection, in particular to a device for displaying potential sweat fingerprints by using temperature difference. The device for displaying the potential sweat fingerprint by using the temperature difference comprises a fixed plate, wherein a rotating plate is rotationally connected to the outer part of the fixed plate; and the protective cover body is placed on the rotating plate, and a refrigeration pipe extending into the protective cover body is installed at the upper end of the protective cover body. According to the utility model, the fingerprint or sweat of the mark-bearing object is stimulated to appear by utilizing a temperature difference mode that the temperature of the surface of the mark-bearing object is different from that of air, and then magnetic powder is brushed or sprayed on the surface of the mark-bearing object after water drops condensed by cold air are dried, and the magnetic powder can be adsorbed and fixed at the positi