Abstract: A modular LED light-emitting marker having a pedestal with a back side, a light-emitting marking side and a holding space. At least a LED circuit board is accommodated into the holding space of the pedestal. The LED circuit board contains a LED setup surface, which faces the light-emitting marking side of the pedestal. The LED circuit board also contains an electrical connecting line penetrating out of the pedestal. A waterproof cladding is assembled between the LED circuit board and the pedestal, and used to fully seal the LED circuit board. A reflecting surface is set onto the light-emitting marking side of the pedestal. The reflecting surface is provided with LED through-holes. A protruding LED unit is arranged onto the LED setup surface The exterior of the protruding LED unit is protruded out of the waterproof cladding and reflecting surface.