A plant growth device is provided which mainly comprises a frame body, a lamp bracket disposed on the top of the frame body, a pot body disposed at the bottom the frame body, and a water pan disposed below the pot body. The lamp bracket is configured with a light-emitting diode (LED) lamp providing light sources with different wavelengths. The pot body disposed at the bottom of the frame body is filled with soil. A water channel is further provided for delivering water, which is connected to a timing-proportioning device and an external water source. A high-oxygen water generating device is further provided, which is connected to the water channel. An ozone (O3) generating device is connected with a gas pipe that is extendingly disposed in the soil of the pot body. A far-infrared ceramic ball is further provided for being mixed in the soil of the pot body, thereby promoting growth efficiency of plants and attaining sterilization efficacy.本發明係有關一種植物生長裝置,其主要包括有架體,架體上方設有燈架,下方設有盆體,盆體下方具有水盤,前述燈架設有不同波長光源之LED燈具,下方盆體內填充有土壤,另設有提供水份之水道,水道連結定時定量裝置及外部水源,本發明另包括有高氧水產生裝置,該高氧水產生裝置連結水道,另包括有臭氧(O3)產生裝置,該臭氧(O3)產生裝置連結有氣管,氣管延設於盆體土壤中,另包括有遠紅外線陶瓷球,該遠紅外線陶瓷球係混合於盆體土壤中,具有增進植物生長效率及殺菌功效。(1)‧‧‧架體(2)‧‧‧燈架(3)‧‧‧盆體(4)‧‧‧水盤(5)‧‧‧LED燈具(6)‧‧‧土壤(7)‧‧‧水道(70)‧‧‧定時定量裝置(71)‧‧‧外部水源(72)‧‧‧高氧水產生裝置(8)‧‧‧臭氧產生裝置(80)‧‧‧氣管(9)‧‧‧遠紅外線陶瓷球
