The invention discloses a non-woven watermark net for obtaining a high-definition watermark and a manufacturing method of the watermark net. The watermark net is a nickel-made watermark net which is made of nickel and is of a flat net structure formed in an electroplating manner; upper and lower end faces of a plurality of nickel wires which are vertically and horizontally distributed in the nickel-made watermark net are on the same plane and bonding points which are formed by mutually crossing the upper and lower end faces are molded to form a whole body; formed net holes are located on the same plane. According to the non-woven watermark net, the nickel-made watermark net is produced by adopting the electroplating manner; the suitable strength and toughness and the corrosion resistance are met when a watermark net cage is manufactured; the thickness of the nickel-made watermark net is smaller than that of a copper net woven under the same quantity and the dehydration effect is better; the diameter of net wires is small and the toughness of the net wires is good so that a pattern level reflected by a watermark plate can be really reappeared on a nickel net, and furthermore, the definition of the watermark is improved.