River channel planting device and method for submerged plants

The invention discloses a river channel planting device and method for submerged plants. A culture device comprises a supporting frame and a culture body, the supporting frame comprises a bottom plate, and two ends of the bottom plate are separately connected with a left support and a right support; the culture body comprises a breeding layer and a nutrient supply layer, and the breeding layer comprises a first sponge layer, a second sponge layer and a circle of grille fence; a lifting device comprises a left mounting seat and a right mounting seat, the left mounting seat is provided with a first screw rod, and the second mounting seat is provided with a second screw rod; the lifting device is further provided with limit pins; the lower ends of the left and right mounting seats are separately provided with one fixing pin; and a PLC, cameras and light sensors are also arranged. According to the river channel planting device and method for the submerged plants provided by the invention,the lifting device and th