Temperature indicating film and preparation method thereof

The invention relates to the technical field of packaging films, in particular to a temperature indicating film and a preparation method thereof. The temperature indicating film comprises a base layer; the temperature indicator layer is compounded on the base layer; the heat sealing layer is compounded on the temperature indicator layer; the temperature indicator layer is prepared from the following raw materials: 0.1 wt%-0.8 wt% of a temperature sensing agent; 0.1 wt%-1 wt% of an inert color developing agent; 0.3 wt% to 2 wt% of a thickening agent; 0.2 wt% to 2 wt% of an adhesive; 94.2 wt% to 99.3 wt% of a solvent; the sum of the dosages of all the components is 100%. The solvent comprises ethanol. The temperature indicating film provided by the invention can display different colors at different temperatures, is uniform in color and luster, is free of pigment flocculation and caking, does not need instrument detection, and can visually judge the corresponding temperature range by observing the color change