Small hydraulic pressure drilling equipment

The utility model relates to the technical field of under-pressure operation equipment, and discloses small hydraulic under-pressure drilling equipment which comprises a drill rod, a main shaft, a first connecting part, a second connecting part and a feeding driving mechanism. The first connecting part comprises a left upper connecting plate, a left lower connecting plate, a left three-way pipe and a hoop which are sequentially arranged and internally communicated, the hoop is provided with a communication port communicated with the left three-way pipe, and the second connecting part comprises a right upper connecting plate, a right lower connecting plate, a right three-way pipe and a high-pressure protection pipe which are sequentially arranged and internally communicated; the small hydraulic pressure drilling equipment solves the problems that an existing design structure is complex in design and high in cost, and if parts are damaged in the later period, maintenance and replacement are extremely inconvenie