One kind can promote the filter coating of plant growth,It is include an ontology,The ontology is equipped with several first filter coatings and several second filter coatings,Wherein,First filter coating penetrates for the feux rouges of wavelength 660nm,And the light of other wavelength is filtered,And the blue light of second filter coating then for wavelength 450nm penetrates,And the light of other wavelength is filtered,Thereby,It only needs between so that the filter coating is installed the crop and lamp that is transplanted,It can pass through first filter coating of grade to filter with second filter coating of grade,And the specific wavelength light that can promote plant growth is provided,Reach the effect of promoting plant growth,To provide a kind of easy installation,And it is not required to the promotion plant growing device of the consumption energy.一種可促進植物生長之濾光膜，其係包含有一本體，該本體上設有數個第一濾光膜以及數個第二濾光膜，其中，該第一濾光膜可供波長660nm的紅光穿透，並濾掉其他波長的光線，而該第二濾光膜則可供波長450nm的藍光穿透，並濾掉其他波長的光線，藉此，僅需使該濾光膜置設於所栽植之作物與自然光源間，即可透過該等第一濾光膜與該等第二濾光膜進行濾光，而提供可促進植物生長之特定波長光線，達到促進植物生長之功效，從而提供一種容易安裝，且不需消耗能源的促進植物生長裝置。
