High-performance metal organic frameworks (MOFs) fiber composites are currently a hot research topic. In this study, a novel UiO-66 loaded low density polyethylene (LDPE) fiber composite (UiO-66@PE) was successfully made via solvothermal synthesis in situ, using melt electrospun LDPE fibers as substrate for the depositing metal organic framework (MOFs) crystal. SEM, XRD, FT-IR and TG were employed to investigate the morphology and structure of the UiO-66@PE fiber composite. The results show that the optimum preparation temperature of the UiO-66@PE fiber composites is 100 ℃; it is a fibrous composites material carrying zirconium-based metal-organic framework material (UiO-66), which is equally loaded on the surface of LDPE fibers. The diameter of UiO-66 crystals ranges from 190 nm to 900 nm. FT-IR analysis reveals that the UiO-66 crystal and LDPE electrospun fiber has no interaction.TG analysis reveals that the thermal decomposition temperature of the UiO-66@PE fiber composites is 425 ℃, which is a little higher than that of the LDPE fiber substrate.