The utility model relates to a cylindrical integrated hydraulic power source of an automatic vertical drilling tool. The hydraulic power source is characterized in that an oil storage cylinder is of a cylinder structure; an oil storage cavity in the oil storage cylinder and an oil inlet channel of a micro plunger pump are eccentrically arranged on the oil storage cylinder; an oil way outlet channel of the micro plunger pump and an oil return channel of the hydraulic cylinder, which are parallel to each other, are arranged on the oil storage cylinder in the direction opposite to the eccentric direction of the oil inlet channel of the micro plunger pump; the oil way outlet channel and the oil return channel are connected with a valve seat by seal ring structures; a relief valve and a one-way valve are respectively installed at the two ends inside the valve seat; and the valve seat and the micro plunger pump are connected into a whole through thread sealing. The hydraulic power source has the following advantages of integrated design, concise and compact structure and stable performances, is convenient to assemble and disassemble, works reliably and is suitable to be installed in the slender tool bodies; one or more hydraulic power sources can be simultaneously installed in the peripheral direction with permission of the spatial position according to the requirement of providing power; and the hydraulic power source expands the hydraulic system of the tool conveniently and flexibly, without affecting the integral structure and length of the tool.