The invention discloses a hydraulic engineering driller which adopts a drilling hydraulic cylinder and a hydraulic motor driven drilling bit component for drilling; a drilling stroke is controlled by the drilling hydraulic cylinder through a pulley block; the drilling hydraulic cylinder is laid out relatively flexibly; the equipment layout space is optimized; the drilling component has a greater ascent and descent space fundamentally; the drilling stroke is prolonged; the drilling movement frequency is reduced, so that the drilling construction efficiency is improved; in addition, due to the optimization, the equipment layout space can be made full use of, so that the driller is compact in structure; with the adoption of a hydraulic driving structure and electrohydraulic control, a stepless speed regulation function is realized, and the driller can meet the drilling requirements of different stratums; a power head is driven by a hydraulic motor and can be combined with mechanical speed reduction, the power transmission reliability is improved further, and the adjustable scope of torque variation is wider; and when the equipment is in use, the labor intensity is reduced, the use cost and labor cost are saved, and the driller can be used for engineering pile hole construction and meets the technological requirements.