The invention discloses a portable all-hydraulic core drilling machine, in particular to a power unit type multi-functional portable all-hydraulic core drilling machine with fundamental types of hydraulic driving and controlling and long-stroke oil cylinder feeding. The portable all-hydraulic core drilling machine comprises an electric control cabinet, three hydraulic oil pumps (20), a hydraulic pivot valve (23), a hydraulic oil tank and a cooler (22), a hydraulic motor (1), a power unit (2), a water swivel (3), an upright post (5), a guide frame (4), legs, two hoist oil cylinders (16), an overhead traveling crane (7), a hydraulic clamp holder (18), a hydraulic wire-line coring winch (27) and other component parts. The whole machine adopts plane layout and building block design, is convenient for disassembling and assembling, has light parts for removing, and is particularly suitable for tunnel drilling of a mountain area or a mining area.