The utility model discloses a portable youth note with a waterproof structure on the surface, and particularly relates to the field of notes.The portable youth note comprises a bottom plate, one end of the bottom plate is connected with a waterproof shell through a flexible connecting part, waterproof protruding edges are arranged on the two sides of the flexible connecting part, and the center of the top of the bottom plate protrudes upwards to form a boss; a loose-leaf binder is installed at the end, close to the waterproof shell, of the top of the boss, a sealing rubber strip adheres to the top of the bottom plate on the periphery of the boss, a sealing groove matched with the sealing rubber strip in shape is formed in the edge position of the waterproof shell, an inserting groove is formed in the end, away from the flexible connecting part, of the bottom of the bottom plate, and a connecting belt penetrates through the inserting groove. The elastic pen inserting sleeve, the file inserting pocket and the illuminating lamp are arranged in the waterproof shell, so that the functionality of the note is enhanced, some bills or important data can be stored, the illuminating lamp can provide an illumination condition for outdoor use at night, and the practicability is higher.