Packaging is one of the most important parts of the food industry that is linked to the food security. Polymers used in food packaging should have a deterrent to moisture and gas. Therefore, it is necessary these films and packaging containers meet some changes that their barrier properties increase to the desired gas. One way to improve the properties of materials is to use the fillers in nanoscales. One of the most widely used nanoparticles is Montmorillonite Nano clay, which by adding this material in about 2-3 wt.% of polyethylene, the permeability of gases decreases significantly. Due to the hydrophilic surface of the Nano clay, the uniform distribution of most types of Nano clay in organic polymers is not simple. Here the importance of compatibility is raise. In this study, polyethylene grafted maleic anhydride (PE-g-MA) was used as a compatibilizer. After blending different amounts of the thermoplastic starch with linear low density polyethylene in the presence of PE-g-MA compatibilizer and converting into a blown film, the optimal amount of TPS was determined by examining printability, traarency, oxygen and water vapor barrier properties and water absorption behavior of the films. Results revealed that the printability improved by increasing TPS in TPS / LLDPE blend, but the film containing 50 phr of TPS showed poor printability due to the poor blending. Also, by increasing the amount of TPS in the TPS / LLDPE blend, the traarency of the film was reduced and oxygen, water vapor barrier properties and water absorption behavior of films were improved. Therefore, the amount of 40 phr of TPS was selected as a desirable amount to continue the research. In the next step, the nanoparticles of cloisite 30B was added to the TPS / LLDPE blend for improving the oxygen barrier property. The films were prepared and experimental tests were performed. By studying the results of the X-ray diffraction on nanocomposites, it was found that the samples containing 1 and 3 phr of nanoparticles showed exfoliated structure and the sample containing 5 phr of nanoparticles was in intercalated structure. Also, the permeability of oxygen in the presence of 1 and 3 phr of nanoparticles in nanocomposite films were decreased to 16.8% and 21.1% respectively, but decreased only 2.9% for 5 phr of nanoparticles. The permeability of water vapor in nanocomposite film and the amount of water absorption were increased with the presence of the hydrophilic nanoparticles in nanocomposites. Therefore, nanocomposite film containing 40 phr of TPS and 3 phr of Nano clay cloisite 30B was chosen as the optimal film for food packaging. Keywords : Linear low density polyethylene, Thermoplastic starch, Nano clay cloisite 30B, Printability, Oxygen and water vapor barrier properties