Combined type water decoding ecological base floating island device

The invention relates to the technical field of water pollution treatment. The combined type water decoding ecological base floating island device comprises a first floating island module, second floating island modules and third floating island modules, the second floating island modules and the third floating island modules are installed on the outer side of the first floating island module, and the second floating island modules and the third floating island modules are alternately distributed; a placement disc mounting groove is formed in the first floating island module, a purification filter material placement disc is arranged at the placement disc mounting groove, and a purification driving structure is arranged in the middle of the first floating island module; an ecological base ring group is mounted at the lower part of the second floating island module, and a first aeration disc is mounted at the bottom of the ecological base ring group; an adsorption group is mounted at the lower part of the third