The present invention allows the LED lamp to be replaced with a simple structure so that the photosynthetic photon flux density can be adjusted, as well as an LED plant growth lamp that promotes plant growth by emitting light of an effective wavelength suitable for the type and growth period of the plant. Regarding, the LED plant growth lamp that is mounted on a cultivation facility where plants are planted to supply a light source to a plant is provided with a base plate, and the base plate is provided with one or more LED bars in parallel, one side of the base plate or On both sides, the LED bar is fixed to the base plate by a locking element so as not to be separated, and the LED bar is provided with a plurality of LED lamps, but by separately separating the LED bar from the electric part of the base plate. The user can replace the LED bar by himself, select the wavelength required for plant growth, and adjust the ratio of the wavelength according to the characteristics of the plant to be planted, and adjust the photosynthetic photon flux density, and insert the LED bar into the protective tube. The LED bar can be easily separated and mounted by forming the fitting part on the inner surface of the through hole so that the lamp is protected without being exposed to the outside and the transparent light-transmitting part and the LED bar can be assembled to slide through the LED lamp. In addition, the opening and closing is made by a locking element provided on the base plate, and the protective tube is made of a material having self-elasticity so that the protective tube can be opened to facilitate replacement of the LED bar. To prevent heat generated from the growth lamp from being transferred to the upper layer, a plate is embedded, and the plate is made of a lightweight material such as a composite plate composed of synthetic resin and aluminum.본 발명은 LED램프가 간단한 구조로 교체가 이루어지도록 하여 광합성 광량자속밀도 조절이 가능함은 물론 식물의 종류와 생장시기에 맞는 효과적인 파장의 빛을 발산하여 식물 성장을 촉진할 수 있도록 한 LED 식물 성
