The invention discloses an outdoor fence base and a manufacturing method thereof, and relates to the technical field of outdoor buildings. The outdoor fence base comprises a foundation pile embedded in the ground, and a base pile in the shape of an opening at both ends is fixedly nested outside the top end of the base pile. A fence frame is inserted in the upper side of the interior of the base pile, a plurality of reserved holes are formed in the side surface of the base pile, and the base pile is fixedly connected with the fence frame through bolts installed in the reserved holes. The outdoor fence base is simple in structure, low in manufacturing cost, convenient to disassemble, rapid to install, labor-saving and material-saving, moisture-proof and anticorrosion, prolonged in service life and conducive to being popularized; and the manufacturing method can quickly install the outdoor fence base, greatly improves the installation efficiency and saves manpower.