Rotary drilling rig for photovoltaic support construction

The invention relates to the technical field of drilling rigs, in particular to a rotary drilling rig for photovoltaic support construction, which comprises a rig body and a soil storage pipe slidably arranged on the rig body. A soil drilling pipe is coaxially and rotatably arranged in the soil storage pipe, and a spiral blade is arranged on the outer wall of the soil drilling pipe; a compaction mechanism used for drilling the ground is arranged at the bottom of the soil drilling pipe, two first hinge grooves are formed in the outer wall of the bottom of the soil drilling pipe in a mirror image mode, and the compaction mechanism comprises two semi-conical drill bits; each semi-conical drill bit is provided with a hinge block, and the hinge blocks are hinged into the corresponding first hinge grooves. The driving mechanism is arranged at the top of the soil drilling pipe and can enable the soil drilling pipe to rotate and move back and forth along the axis of the soil storage pipe at the same time. And through