Anti-lost bracelet

The utility model relates to the technical field of smart bracelets. The bracelet comprises a bracelet band, a soft magnetic label is connected to the top surface of the bracelet band, a warning boardis arranged below the bracelet band, a boss is arranged on one side of the bracelet band, a square groove is formed in one side of the boss, a reflective sticker is bonded to the bottom side of the square groove, and a red sticker, a yellow sticker and a green sticker are sequentially connected to the outer side of the warning board from top to bottom; according to the utility model, the reflective stickers are bonded in the square grooves, and family contact numbers are written on the reflective stickers, so that the attention of passersby can be attracted by the reflective stickers, and therescued probability of a patient is increased; a soft magnetic label is adhered to the boss, a protective door is arranged at the door of a hospital, and a nurse can know that a patient walks out atthe first time through a co