The present invention provides a plant growth lamp module (10) and a plant growth lamp using this module. A plurality of the plant growth lamp modules (10) can be connected. The module comprises a casing (110); a power supply (160) in the casing; a male socket (130) and a female socket (120) disposed on two inner sides of the casing respectively and electrically connected to the power supply; and a lighting unit (140) disposed in the casing and electrically connected to the power supply to emit light after energizing, which is transmitted outwards via a hole. The plant growth lamp in the present invention may have various adjustments to meet growth needs of various kinds of plants. Further, the plant growth lamp in the present invention enables plants to carry out photosynthesis even in an environment without sunlight and stimulate healthy growth of plants.本創作提供一種植物生長燈模塊及使用該模塊的植物生長燈。所述植物生長燈模塊可以多個連接,其中所述模塊包括殼體;電源,設在所述的殼體內;公插座和母插座,分別設在所述的殼體內的兩側,與所述的電源電連接;以及照明單元,其設在所述的殼體內,與所述的電源電連接,以在通電後發光,發出的光線經所述的孔向外透射。本發明的植物生長燈能進行各種不同的調整,以滿足各種植物的生長需求,此外,本發明的植物生長燈能使植物在無陽光的環境下依然能夠進行光合作用,促進植物健康生長,而且結構簡單、節能環保,使用和調整靈活。