Adjustable weft yarn frame

The utility model belongs to the technical field of weft yarn frames, and particularly relates to an adjustable weft yarn frame which comprises a frame body. An adjusting bin is formed in the frame body, a bottom plate is fixedly connected to the bottom end of the frame body, an adjusting mechanism is arranged in the adjusting bin, and the device is characterized in that the adjusting mechanism comprises a motor bin, the motor bin is formed in the position, close to the center, of the top end of the frame body, and a servo motor is arranged in the motor bin; a rotating shaft of the servo motor is fixedly connected with a threaded rod, limiting rods are arranged at the positions, close to the two sides of the threaded rod, in the adjusting bin, the outer side of the threaded rod is connected with a platform through threads, the platform is arranged on the outer side surfaces of the limiting rods in a sleeving mode, and square holes are formed in the positions, close to the two sides, of the front end of the fr