An LD tube core foot gathering device includes a support platform and a positioning device, an absorbing robot and a gathering device arranged on the support platform. The positioning device includes two positioning blocks fixed on the support platform, and the same end of the two positioning blocks is provided with a positioning portion. The other end of the two positioning blocks is provided with a rotating cylinder. The free end of the rotating cylinder is provided with a positioning chuck. The gathering device includes two opposite gathering cylinders. The two gathering cylinder cylinders are relatively arranged, and a pusher is arranged on each of the two cylinder rods. The structure of the present utility model is simple, and the LD tube core feet can be automatically gathered and accurately cut, which makes the processing and cutting more reliable, and greatly improves the processing efficiency, and greatly reduces the labor operation fatigue.