Colloidal semiconductor quantum rods(QRs)are of great interest for both fundamental research and technical applications due to several unique electrical and optical properties,such as linearly polarized emission,exciton storage,electroluminescence,and efficient 1D electrical transport,which are determined by their anisotropic shape.Studies about QRs are less than about quantum dots,and they have been widely investigated as fluorescent biomarkers and chemical catalysis.But there is little research about brightening film containing QRs for wide color gamut LED display.Therefore,developing initiative brightness enhancement film containing aligned QRs composites with high efficiency and high stability for new generation wide gamut LED display and analyzing its linearly polarization characteristic is an important and urgent task with theoretical significance and application value.In our work,core/shell CdSe/ZnS nanorods with aspect ratio 1:4 were prepared by a seeded growth approach and we have developed a simple and effective method that allows colloidal CdSe/ZnS core/shell nanorods to be perfectly aligned in PMMA nanofibers by electrospinning by controlling the process parameters,such as concentration,voltage,receiving distance,injection speed,temperature and roller speed to obtain well aligned continuous fibers film.Fluorescence spectra show high luminous efficiency and narrow full width at half maximum while the well alignment was reflected by SEM and TEM.It is worth mentioning that thanks to the comprehensive nanorod alignment,the film exhibits strong polarized photoluminescence(at least 35%polarization degree)and can be excellently used as active brightness enhancement film in LCD backlight or many other fields.