Design of high-yield light conversion agent with excellent processability is of important research value for synthesizing agricultural light-converting films. Bromine-substituted triphenylethylene and 4- vinylphenylboronic acid were used as raw materials to synthesize monomer VP3St by Suzuki coupling reaction. And the synthesized monomer VP₃St was polymerized into polymer PVP₃St via radial polymerization in the presence of initiator AIBN. UV-vis and fluorescence characterizations show that the maximum emission wavelength of PVP₃St is 443 nm, and the intensity is gradually improved with increased water volume fraction, showing unique aggregation-induced emission property. In addition, the 5% mass loss temperature of PVP₃St is determined to be 461 ℃, implying high thermal stability. Furthermore, PVP₃St was introduced into polycaprolactone ( PCL) and polymethyl methacrylate ( PMMA) to fabricate light conversion polymer films PVP₃St-PCL and PVP₃St-PMMA, which have excellent light transmittance (>90% ) in the range of 410~800 nm, and show tensile strength of 1456 kPa and 1157 kPa with elongation at break of 1147% and 247.9% , respectively. More importantly, PVP₃St-PCL and PVP₃St-PMMA could effectively absorb the light of 230 ~ 400 nm to show blue fluorescence emission, which highly overlap with the UV-vis spectrum of chlorophyll with rates of 73.5% and 77.7% , contributing to the photosynthesis for improving crop quality and yield.