A light emitting decorative apparatus includes a main frame, a socket, a cover, a soft rubber jacket, and an ornament. Thus, when the protruding probe detects existence of the water, and when the optical sensitive resistor detects that the light is weakened to a determined extent, the optical sensitive resistor triggers the circuit board to drive the light emitting diode to emit light outward, and the optical fibers conduct the light to the ornament, so that the ornament lights and blinks, thereby greatly enhancing the aesthetic quality of the light emitting decorative apparatus.