The utility model discloses a modularized three-dimensional planting device which comprises a three-dimensional planting plate, a liquid adding
assembly is installed on the top of the three-dimensional planting plate, liquid needed by planting is conveniently added into the planting device through the liquid adding
assembly, and the liquid adding
assembly comprises an installation groove, a fixing
pipe and a liquid inlet spray head. The mounting groove is formed in the top of the three-dimensional planting plate, the fixing
pipe is mounted in the mounting groove, and the liquid inlet nozzles are symmetrically mounted on the two sides of the fixing
pipe. The fixing pipe in the liquid adding assembly is installed on the top of the planting plate through the installation groove, after liquid for planting enters the fixing pipe, the liquid can enter the liquid adding hole through the liquid inlet spray head and finally enter the planting groove through the liquid adding hole, plants are planted in the planting groove, and the planting effect is good. And therefore, a worker can conveniently add the planting liquid to the planted plants.