Water planting and breeding method and device

The invention relates to the field of planting and breeding, and provides an overwater planting and breeding method and device.The planting and breeding device comprises a plurality of planting compartments and a plurality of hollow pipes, the planting compartments are connected through the hollow pipes, and water inlet holes are formed in the planting compartments. During planting, the planting and breeding device is placed on water, a nutrient medium is placed in the planting compartment, and plant seeds are played in the nutrient medium. By means of the method, the planting area can be greatly increased, and the grain yield can be greatly increased. When the planting and breeding device is used for planting rice, insect pests can be killed by a water logging method, and the device is environment-friendly and healthy. When the planting and breeding device is used for planting rice on water, the rice can be bred in the water, lighting of the water body is not affected, oxygen uptake and ingestion of aquatic