Yarn clamping assembly

The utility model discloses a yarn clamping assembly which comprises a yarn guide tube, a through hole is formed in the middle of the yarn guide tube, a clamping mechanism is arranged at one end of the yarn guide tube, the clamping mechanism comprises two clamping blocks, a bolt is connected to the middle of one clamping block in a threaded and penetrating mode, and limiting rods are fixedly connected to the two sides of the upper surface of one clamping block. Two sliding grooves are formed in the lower surface of the other clamping block, the tops of the limiting rods are connected with inner cavities of the sliding grooves in a sliding and penetrating mode, and a moving mechanism is arranged on the back face of the other clamping block. One end of the yarn is arranged on one side between the two clamping blocks, then the bolt is rotated, so that one clamping block moves upwards in the vertical direction along the bolt, the two limiting rods are driven to move in an inner cavity of the sliding groove, the c