Tunnel construction excavating device

The invention relates to the technical field of tunnel digging equipment, in particular to a tunnel construction digging device which comprises a connecting device and a driving device arranged on the rear side of the connecting device, and a drilling device is arranged on the right side wall of the driving device. According to the tunnel construction excavating device, a driving motor in the driving device is controlled to rotate forwards to drive a worm gear to rotate, the whole drilling device is driven to rotate at a high speed through contact between the worm gear and a butt joint tooth roller in the outer sleeve part, and meanwhile, the worm gear also drives a worm to rotate together with a rotating rod; and arc-shaped gear teeth on the driving gear are driven to be in contact with a fixed toothed plate in the connecting device, so that the driving device and the drilling device are driven to integrally move towards a rock wall, constructors can remotely control when the water milling drilling machine d