Pressure-adjustable dual-purpose pump truck for punching and drilling

The invention relates to a pressure-adjustable dual-purpose pump truck for punching and drilling. The pressure-adjustable dual-purpose pump truck comprises a machine body, wherein a travelling assembly is arranged on the bottom of the machine body; a load-sensitive pump and a load-sensitive multi-path control valve are arranged on the machine body; an inlet of the load-sensitive multi-path control valve communicates with an outlet of the load-sensitive pump through an oil outlet tube; a high-pressure filter is arranged on the oil outlet tube; an outlet of the load-sensitive multi-path control valve is connected with an inlet of a hydraulic motor; the hydraulic motor is connected with a water pump; an outlet of the hydraulic motor is connected with an oil tank through an oil return tube; a cooler and an oil return filter are arranged on the oil return tube; a reversing valve and an overflow valve are arranged on a control oil path of the load-sensitive pump; and the overflow valve is arranged at the outlet sid