The invention discloses a numerical control hobbing machine tool for blade roots. The numerical control hobbing machine tool comprises a machine tool base plate part. The machine tool base plate part is provided with a left working mechanism and a right working mechanism. Each working mechanism comprises a longitudinal slippage part which makes longitudinal movement on a linear guideway. A transverse slippage part is arranged on each longitudinal slippage part. A vertical slippage part is arranged on each transverse slippage part. A spindle is arranged on each vertical slippage part. Each spindle is provided with a hobber. Blades of each hobber are distributed on the surface of a hobber body in a spiral mode. The two spindles of the left working mechanism and the right working mechanism are symmetrically arranged. The directions of the hobbers of the left working mechanism and the right working mechanism are symmetrical and include left rotation and right rotation. A dust hood is arranged on the upper portion of each hobber. The dust hoods communicate with a dust collector through dust suction pipes. The half-blade joint surface finished by the numerical control hobbing machine tool can completely meet the requirement of a design model, and no dust flies at the scene. The machine must be installed on a mold quickly, reliably and safely.