Portable head-mounted positioning label of safety helmet

The utility model discloses a portable head-wearing type positioning label of a safety helmet, which comprises a face shell, a middle frame and a bottom shell, the face shell, the middle frame and the bottom shell jointly form a positioning label shell, a display screen is embedded in the middle of one end of the top of the face shell, a large support is arranged at one end of the bottom of the bottom shell, and the large support is connected with the display screen. The small support is fixedly installed on the inner side of the large support, the top end of the inner side of the large support is provided with a supporting panel through a bolt, and the two sides of the bottom end of the inner side of the large support are fixedly provided with inner guiding grooves, and the small support is pulled to drive the guiding outer shell to slide along the outer sides of the inner guiding grooves, and the clamping springs are compressed in the sliding process of the guiding outer shell; after the large support and t