The utility model provides a plant cultivation device capable of restraining bad influences caused by heat emitted from lighting devices on a cultivated plant. The plant cultivation device is provided with a cultivation frame (3) and the lighting devices (5). The cultivation frame (3) is provided with multiple struts (7) and carrying parts (4), wherein the carrying parts (4) are arranged at intervals vertically, provided with cultivation grooves (2) through the struts (7) and used for bearing the cultivation grooves (2) where plants are planted. The lighting devices (5) are arranged at intervals on the cultivation frame (3) above the carrying parts (4) and provided with horizontal frames (18), multiple LED lamps (19) installed on the horizontal frames (18) and a board-shaped reflection component (21), wherein the board-shaped reflection component (21) is located above the LED lamps (19) and installed on the horizontal frames (18) and a reflection face is arranged downwards. Multiple penetrating parts (38) for dissipating heat emitted by switch power sources (37) out are formed in the positions, corresponding to the switch power sources (37) of the LED lamps (19), in the board-shaped reflection component (21).
