Hinge

The invention discloses a hinge, which comprises a first hinge component and a second hinge component which is rotatably arranged on the first hinge component, wherein the first hinge component is a U-shaped groove, two convex poles are respectively arranged on both sides of the top of the U-shaped groove, a limiting piece is arranged at the bottom of the U-shaped groove, both ends of the second hinge component are movably clamped between the limiting piece and the two sidewalls of the U-shaped groove, the second hinge component is provided with through holes matched with the convex poles on the first hinge component, and a stopper capable of limiting a rotating angle of the second hinge component is arranged on one side of each of the convex poles. The hinge, provided by the invention, has the advantages of simple structure and controllable rotating angle.