Ecological floating island for treating still water areas

The invention discloses an ecological floating island for treating still water areas. The floating island comprises a floating island carrier, planting tanks are formed in the upper end of the floating island carrier, a water storage tank is formed in the upper end of the floating island carrier, a water inlet communicated with the water storage tank is formed in the lower end of the floating island carrier, a transparent sliding plug is hermetically and slidably connected into the water storage tank, and a transparent cylinder is fixedly connected to the inner bottom of the water storage tank. A low-boiling-point evaporation liquid in an evaporation cavity is rapidly evaporated and vaporized through illumination to push the transparent sliding plug to move upwards, water can be pumped into the water storage tank, the water entering the water storage tank can also absorb the heat in the transparent cylinder, the low-boiling-point evaporation liquid in the evaporation cavity is condensed into the liquid again,