The invention provides a vacuum pipe type vibration feeding machine, which comprises a feeding pipe body and a shock excitation device, wherein the shock excitation device comprises two eccentric vibration motors and a thrust plate, the eccentric vibration motors are fixedly arranged on the thrust plate, the thrust plate is fixedly arranged on the outer wall of the feeding pipe body, the two ends of the feeding pipe body are respectively provided with a feeding opening and a discharging opening which are respectively connected with an outlet of a material cabinet and an inlet of a discharging slide pipe, position limiting mechanisms are arranged at the two sides of the feeding opening, and are fixedly arranged on a connecting support frame, a vibration reduction spring is arranged between the connecting support frame and the feeding pipe body, the vibration reduction spring supports a vibration reduction frame, the vibration reduction frame is fixedly arranged on the feeding pipe body, the feeding pipe body carries out periodic reciprocating vibration under the effect of the eccentric vibration motors, and in the steel liquid vacuum processing period, the upward moving space of the vibration reduction frame is limited through the position limiting mechanisms, so that the feeding machine maintains the balanced state and the normal feeding capability, the distance between a discharging opening of the vacuum hopper and a feeding opening of a vacuum groove system in the horizontal direction can be shortened, and the vacuum pipe type vibration feeding machine has the characteristics that the fault rate is low, and the overhaul and the dismounting are convenient.