A display panel and a manufacturing method thereof and a display device are provided. The display panel includes a semiconductor base substrate, a display array and a thermal imagination array. The display array is formed on the semiconductor base substrate, and includes a plurality of display pixels arranged in an array, and each of the display pixels includes at least one display sub-pixel, and each display sub-pixel includes a light-emitting component. The thermal imagination array is formed on the semiconductor base substrate and includes a plurality of thermal imagination pixels, and each of the thermal imagination pixels includes at least one thermal imagination sub-pixel, and display sub-pixels and thermal imagination sub-pixels are arranged in a blending way.