Device and method for weaving main cable threads

The invention discloses a device for weaving main cable threads. The device is a production line composed of a wire guide frame, a pay-off spool, a wire distribution frame, n sets of forming and dragging devices, a wrapping machine and a coiling machine which are sequentially connected. Each set of forming and dragging device comprises a forming device and a dragger. A buffer area is arranged between every two forming and dragging devices. A method for weaving the main cable threads includes that steel wires are released from the pay-off spool, and pass the wire guide frame, the wire distribution frame and a forming device I to be clustered to be in the shape of cross sections of the main cable threads; under dragging and clamping actions of a dragger I, the steel wires enter the dragger I and the buffer areas among the forming and dragging devices; the steel wires are output by a dragger N of the Nth set of forming and dragging device to the wrapping machine, finished main cable threads are formed after fixed-distance wrapping is performed, and rolling and coiling of the main cable threads are performed by the coiling machine; N satisfies the condition that 2