<p>A novel agricultural film, called light conversion film, has been developed to enhance the agricultural environment by regulating light, temperature, and humidity. Enhancing the ultraviolet (UV) absorption and durability of light conversion agents is crucial for meeting agricultural requirements.In this work, a light conversion mulch film (denoted as LM) was fabricated by incorporating the synthetic light conversion agent LTTF [Eu(TTA)₃(TPPO)(Phen)] into polyethylene (PE) matrix. The LTTF complex was synthesized with Eu³⁺ as the luminescent center,while 2-thiazoyltrifluoroacetone(TTA), riphenylphosphine oxide(TPPO) and 1,10-phenanthroline (Phen) were selected as the matching ligands.The LTTF can convert harmful UV radiation [<CitationRef CitationID="CR1">1</CitationRef>] (predominantly UV-B, which potentially damages the photosynthetic apparatus and DNA integrity of plants) into red light conducive to plant utilization, and it exhibits a high fluorescence quantum yield (PLQY) of 96.12%. Blending LTTF with polyethylene (PE) led to the formation of light conversion films (LM) which demonstrated over 20 times greater efficiency than pure PE films. Field trials demonstrated that soil temperature under LM mulch increased by 13% compared to soil with PE film. Plants grown under LM mulch exhibited increases in height by 21.2% and 25.65%, stem thickness by 13.8% and 15.5%, leaf area by 8.83% and 12.25%, shoot fresh matter by 40.53% and 83.45%, and shoot dry matter by 56.24% and 137.55%, relative to plants covered with PE film and bare ground, respectively. Additionally, the yield of spring maize in soil covered with LM reached 23742.15&#xa0;kg·ha⁻¹, representing a 3.78% (<i>P</i> = 0.042) increase compared to soil covered with PE. Furthermore, LM was found to elevate soil temperature and potentially enhance the sowing time of spring maize, thereby promoting the maturity of maize and offering a novel approach to enhance crop yield and economic returns.</p>