The invention discloses a hairpin. The hairpin comprises a hairpin body, buckles, bolts, clips and springs, wherein the hairpin body is of a U-shaped structure, first grooves are formed in the two sides of the hairpin body respectively, the clips are connected with the hairpin body through the bolts, two second grooves are formed in the bottom ends of the hairpin body, the two second grooves are located in the two ends of openings of the hairpin body respectively, the buckles are movably arranged in the second grooves, the T-shaped buckles comprise bottom columns, connecting columns and firstgaskets, the buckles are connected with the hairpin body through the springs, the bottom columns are of cylinder structures, the springs are arranged in the second grooves, the second grooves are internally provided with T-shaped connecting blocks integrated with the hairpin body, one ends of the springs sleeve the connecting blocks, and the other ends of the springs abut against the bottom columns. The hairpin has the advantages that the structure is reasonable in design, the use is convenient, and the hairpin can be widely popularized and applied.