Weaving machine weft drawing method and automatic weft drawing device

The invention discloses a weaving machine weft drawing method which comprises the following steps: yarn guiding: when a weaving machine gives a weft stop alarm, braking and reversing, so that wrong yarns are positioned in loose yarns blown by an upper blowing valve and extend into a yarn suction valve; yarn pressing, wherein when the yarn appears between the driving wheel and the driven wheel, a downward pressing mechanism descends and presses the yarn to the belt; yarn driving: the scissors cut off the yarn, and the driving wheel rotates to drive the driven wheel and the belt to rotate, so that the yarn is extracted from the cloth cover and sucked by the yarn suction valve; and resetting: after the wrong yarn is sucked, the driving wheel stops, the pressing mechanism is lifted, and the weaving machine is started again. According to the weft drawing method of the loom, the yarn is pressed onto the belt through the pressing mechanism by setting the yarn pressing step, so that the slipping and snapping risks of