Synthetic biodegradable polymers, due to their wide application and large quantities, are increasingly being disposed of in the environment and leading to pollution. As a consequence, climate change occurs, as well as a negative impact on the plant and animal life. Therefore, there is a tendency to replace synthetic polymers with biodegradable and renewable materials. Polyethylene is one of the most commonly used synthetic polymers for packaging and films, while rice husk (RH) is a biodegradable material that is generated as waste after rice production. RH can be added as a filler in the polymeric matrix of linear low-density polyethylene (LLDPE), with TiO2 (titanium dioxide) as a photocatalytic factor. For the purpose of this study, biocomposites were prepared using LLDPE as the matrix and RHA as the reinforcement, with and without the addition of TiO2 as a photocatalytic agens. To determine the photocatalytic activity of TiO2, the biocomposites were exposed to UV radiation for a period of 10 and 30 days. Characterization was conducted before and after UV radiation using differential scanning calorimetry (DSC) and Fourier-transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR). The DSC results showed that the addition of RH to LLDPE caused a slight shift in the melting temperature (Tm) to higher values, while increasing the content of RH resulted in almost unchanged Tm before UV radiation. The addition of TiO2 to LLDPE/RH biocomposites showed minor changes in Tm, a significant increase in crystallinity obtained which confirms the TiO2 nucleating effect. After UV radiation, slightly higher Tm values were obtained in LLDPE/RH biocompositeswith lower degree of crystallinity. With an increase in RH content, the degree of crystallinity decreased in LLDPE/RH biocomposites. The addition of mTiO2 changed the degree of crystallinity and protect the LLDPE/RH biocomposites from UV degradation. With addition of RH absorption band at 1051 cm^-1 or 1080 cm^-1, characteristic of Si-O-Si silicon groups appeared. Absorption bands at 1246 cm^-1 and 1144-1056 cm^-1 due to cellulose, hemicellulose, and lignin. In the LLDPE/RH/TiO2 biocomposites with less content of RH mTiO2 acts as UV stabilizer.