NOVELTY - Purifying ecological floating-island pond water, comprises: (i) delivering air in to the outgassing stone arranged in the water-pumping pipe through the air pump water-pumping system; (ii) degrading the organic pollutant in water into micro molecules of inorganic nitrogen and mineralized substances; and (iii) passing water into the postpositional biological water purifying floating bed after light-catalyzed reaction, where purified water flows out of floating bed by absorbing nutrition of upper hydroponics plant and degrading lower microbe filler filtering layer biomembrane.    USE - The method is useful for purifying ecological floating-island pond water.    ADVANTAGE - The method consumes less energy.    DETAILED DESCRIPTION - Purifying ecological floating-island pond water, comprises: (i) delivering air in to the outgassing stone arranged in the water-pumping pipe through the air pump water-pumping system, where the oxygen-containing gas is released constantly in the water-pumping pipe and these micro bubbles raises water level, and flows into the light-catalyzed reaction water slot; (ii) degrading the organic pollutant in water into micro molecules of inorganic nitrogen and mineralized substances by passing the water in to the light-catalyzed reaction water slot through the glass pearl curtain catalytic reaction arranged horizontally and reacting with the titanium dioxide series catalytic film coated on the glass ball under sun's ray or UV light radiation; and (iii) passing the water into the postpositional biological water purifying floating bed after the light-catalyzed reaction, where the purified water flows out of the floating bed by absorbing the nutrition of upper hydroponics plant and degrading the lower microbe filler filtering layer biomembrane, and the purified water returns to the solar photocatalytic floating bed. The pond comprises a solar photocatalytic floating bed, whose upper part is provided with a glass pearl curtain catalytic reaction, a light-catalyzed reaction water slot, an aerating water-pumping system, and a solar photovoltaic power generating system. The solar photovoltaic power generating system comprises a solar photovoltaic electroplate, a storage battery, and a charging-discharging controller. The output circuit of the solar photovoltaic electroplate is respectively connected with the storage battery and the air pump by the charging-discharging controller, where the glass pearl curtain catalytic reaction is provided with a UV light-emitting diode string. The back part of the solar light-catalyzed floating bed is provided with biological water purifying floating bed. The upper layer of the biological water purifying floating bed is provided with a hydroponics plant and the lower layer is provided with a microbe filler filtering layer. The microbe filler filtering layer is inserted with multiple air guiding pipes stretching out of the water face.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the solar photocatalytic floating bed for purifying ecological floating-island pond water.