Splicing type planting device, planting system and construction method of planting system

The invention relates to the technical field of greening facilities, and discloses a spliced planting device, a planting system and a construction method thereof.The spliced planting device comprises splicing modules, planting plates and light supplementing lamps, the splicing modules are provided with side walls of the same size, can be freely combined along a mounting surface to form a bottom layer structure and can be freely spliced in the first direction to form a three-dimensional upper layer structure, and therefore the planting plates can be spliced in the first direction to form the three-dimensional upper layer structure; the combined shape and size of the bottom layer structure and the three-dimensional height difference of the upper layer structure can be formed by splicing the splicing modules, the planting module is integrally of a three-dimensional structure, light supplementing lamps can be arranged on part of the splicing modules of the upper layer structure to form light supplementing modules