Rotary spitting drill

The utility model discloses a rotary spitting drill, which comprises an outer drill bit and an inner drill bit, wherein the outer drill bit is fitted with a first drive shaft, and rotates around a center of rotation according to a first direction; the inner drill bit is fitted with a second drive shaft, and rotates around the center of rotation according to a direction opposite to the outer drill bit; the first drive shaft and the second drive shaft are concentric; the outer drill bit and the inner drill bit respectively comprise a drill bit body and a cutting edge; the cutting edges are respectively at the same ends of the outer drill bit body and the inner drill bit body; the cutting edges of the outer drill bit and the inner drill bit do rotary splitting motion along with the rotation of the drill bits. The utility model provides the rotary spitting drill which is efficient in drilling, strong in self-drilling capacity, has no impact vibration, is capable of automatically balancing a cutting force and is s