The utility model relates to a flexible stop device for fiber tube is inhaled to wire feeder, the device include support and buffer gear, the support bracket is L shape, the one end of support bracket weld in fixed inhale the fiber tube on, buffer gear is installed by the support bracket hole to the other end, buffer gear is connect by an end rotation and is fixed with the block rubber, middle cover is equipped with buffer spring, another end rotation connects adjusting nut and lock nut's screw rod to constitute, when fiber tube clockwise rotation was inhaled in the material level activity of uprising, the stop device inhaled the fiber tube to stop device's impact by buffer spring and block rubber reduction activity, the messenger is movable to inhale the fiber tube and in time restores to the throne to a suitable position of inhaling, having inhaled and the transport of assurance pipe tobacco, the utility model relates to a simple structure, that the installation is changed is convenient, durable, with low costs to can effectively guarantee to inhale the life that the fiber tube is in reasonable confession silk position, extension stop device.