The utility model discloses a big fine structure that widens fine device is put forward to electromagnetism, draw the tap including carrying, it is connected with many big fibres to carry the below of drawing the tap, it is big fine from last to down including fixed connection's lifting rope, pole setting A, fine A, fine B and pole setting B in proper order, fine A and fine B are the cotton thread, the button hole is detained, is formed mutually in fine A and fine B fifty percent discount for the warp who weavings the nanjing brocade passes from the button hole, lifting rope's top draws the tap to be connected with carrying, pole setting B's bottom is unsettled. By the utility model discloses the structure can know, carries and draws the tap below to be equipped with lifting rope, and pole setting A directness that will be heavier is connected with lifting rope, locate heavier pole setting A's below with fine A and fine B, and pole setting B that will be lighter locates fine A and fine B's below for big fibre can provide sufficient gravity and in order to overcome lifting rope and to put forward the frictional force of drawing between the tap, prevent that fine A and fine B from receiving great pulling force for a long time and breaking, the big fine life of extension, and big fine cost is lower.