The water well drilling rig is a lightweight, efficient, and multifunctional drilling machine designed for water wells, agricultural irrigation wells, and other boreholes. It is especially suitable for projects in mountainous regions and rocky formations. Utilizing advanced hydraulic technology, the rig is equipped with high-torque hydraulic rotation motors and large-diameter hydraulic cylinders for powerful propulsion and lifting. It supports rotary drilling with alloy drill bits and impact rotary drilling with ball-tooth bits for hard rock. In unstable formations like gravel layers, a DTH hammer with casing can be used to ensure stable and fast hole formation.