The invention discloses a utility model of a universal adaptor for optical fiber connector. The universal adaptor consists of a semicylindrical shell (4), a central rotation shaft (15) arranged in the semicylindrical shell (4), and a rotation disc (1) arranged on the top surface of the semicylindrical shell (4). The rotation disc (1) is in movable connection with one end of the central rotation shaft (15). Another rotation disc is arranged on the bottom surface of the semicylindrical shell (4), and is in movable connection with the other end of the central rotation shaft (15). An optical fiber incidence interface is arranged on the rotation disc (1). An optical fiber emergence interface is arranged on the other rotation disc. A lens group (3) is formed by a first convex lens (13) and a second convex lens (14) in the inner cavity (2) of the semicylindrical shell (4). The first convex lens (13) and the second convex lens (14) are parallel to each other. The right focusing point of the first convex lens (13) and the left focusing point of the second convex lens (14) are at the same position. The utility model has simple structure, portability and low cost.