The invention relates to a high-efficiency vacuum degassing device for milk processing. The device comprises a main body, wherein a vacuum apparatus is arranged in the main body, and a degassing mechanism and an auxiliary mechanism are arranged in the main body; the degassing mechanism comprises a connecting box, a driving motor, a transmission shaft, a stirring rod, a heat conducting plate and atleast two heat conducting rods. An auxiliary assembly comprises a blade, a rotating shaft, a bearing base, a transmission assembly and two connecting pipes, wherein the connecting pipes are parallelto the transmission shaft. The high-efficiency vacuum degassing device for milk processing achieves a stirring function through the degassing mechanism, so that air in milk is discharged from the milk, and the degassing effect is improved. In addition, the temperature of the milk is raised through the auxiliary mechanism, correspondingly bubbles in the milk can be thermally expanded, the buoyancyof the bubbles in the milk can be thus improved, and the degassing effect is further improved.