The invention relates to a star-structure organic inorganic hybridization green light glowing material and preparation and application thereof. The components thereof comprise: a functional end silsesquioxane POSS core structure part, a single functional end organic green light emitting group part and an end capping organic molecule; wherein, the mol ratio thereof is 1:n:m-n; the preparation includes that the functional end silsesquioxane POSS and the single functional end group green light emitting molecule are used for preparing a controllable star-structure organic inorganic hybridization green light emitting material in mol ratio of 1:n under catalysis of a cuprous salt by adopting click chemistry and the like, wherein, n is equal to 1-14. The green light material is applied to the fields of various displays, optical communication, indoor decoration light sources, three-dimension storage, optical modulation and solar cell and the like. The green light material of the invention hasthe advantages that the structure is easy to precisely control, film forming performance is good; and meanwhile, the preparation technique is simple and environmental-friendly with fast reaction speed.