Rock drilling propelling device

The invention relates to the field of rock drilling equipment, in particular to a rock drilling propelling device which comprises a rack and a front rack arranged at the front end of the rack. The drilling assembly is slidably arranged on the surface of the rack. The hydraulic cylinder is used for driving the drilling assembly to linearly move. The displacement assembly is arranged on the surface of the front frame; the displacement assembly is symmetrically and rotatably connected with two swing arms, a telescopic cylinder is connected between the two swing arms, fixed toothed plates are arranged at the front ends of the swing arms, and the telescopic cylinder extends to drive the two swing arms to expand and swing, so that the two toothed plates are expanded and clamped in rock holes. Effective tensile force is generated among the rack, the front rack and the rock and used for resisting counter-acting force generated when the hydraulic cylinder pushes the drill bit to work, stress support of a construction