Non-degradable polymers as a packaging materials has bad influence on the environment, cause damage to plants and animals, it's being consider as one of the greatest environmental problem today. Low density polyethylene (LDPE) sheets are used in food packaging because of their good mechanical properties, easy processing and flexibility. However the lack of LDPE as non-degradable packaging material has a major impact on environmental pollution. Plants grown as a raw material for the production of natural fibers are a source of raw material independent of petroleum products, however, are particularly interesting because of its availability, reproducibility and acceptability in terms of environmental protection. The aim of this study was to prepare biocomposites with melt mixing (compounding) of natural lignocellulose, rice husk (RH) and LDPE in order to obtain biodegradable polymer material. After preparation of LDPE/RH biocomposites with different content of rice husk (5, 10, 15, 20, 25 and 30 wt%) the influence of the rice husk and their content on thermal properties of LDPE/RH biocomposites was investigated. Thermal stability of the neat LDPE and LDPE/RH biocomposites was studied using thermogravimetric analysis (TGA) in nitrogen atmosphere. The viscoelastic properties, the storage modulus (E ') and loss modulus (E'') as a function of temperature for the neat LDPE and LDPE/RH biocomposites were obtained by dynamic mechanical analysis (DMA). The phase transitions were obtained using the differential scanning calorimetry (DSC). Results confirmed that the incorporation of the RH into the LDPE and increase oft he content oft he RH slightly increased the crystallinity which means that RH act as a nucleating agent. The initial degradation temperature of the neat LDPE is shifted to higher temperature by addition of RH which means that the thermal stability oft he LDPE increased by the addition of RH. The DMA measurements showed that the glass trasition temperature Tg of the LDPE in the blends were increased with the addition of RH. This behaviour is due to the interaction between RH and LDPE.