The invention belongs to the field of flower and fish co-culturing devices and particularly relates to a flower and fish co-culturing device which is suitable for flower and fish co-culturing and can be used for vegetable and fish co-culturing. The flower and fish co-culturing device comprises a groove and a cover plate. The culturing groove is a common glass container. The cover plate comprises a mesh, an aerator pipe and a flower pipe. The aerator pipe and the flower pipe are inserted on the mesh and can be freely taken off. For plants, excrement of fishes can provide certain nutrition, so that only a small amount of nutrition liquid needs to be added. For fishes, plankton in the nutrition liquid and secretion of the roots can meet the nutrition requirement. The flower and fish co-culturing device has the advantages of being simple in structure and low in machining cost, and a small flower and fish co-culturing ecology landscape is achieved.