The aim of the study is to enhance the natural fibers in the development of composite material. For this reason we opted for jute fiber as a reinforcement of blend of two polymers polylactic acid (PLA) and low density polyethylene (LDPE) in the presence of polyethylene compatibilizer glycidyl Methacrylate (PE-GMA) in the following composition PLA / LDPE / PE -GMA ( 80/20/5 ). The mechanical, thermal properties and morphology of the composites were investigated. the Were have prepared and characterized of jute fiber/composites. For that purpose, PLA/LDPE/PE-GMA blends reinforced of variable composition of jute fiber (0% - 40%) were prepared. They were characterized in terms of physical properties (density), mechanical properties. Their morphology was investigated by scanning electron microscopy. The results show that the properties of the fiber jute composites are better so the higher value of strength was obtained when the content of jute fiber 40%. Generally, a relatively good dispersion was achieved in composite with 20% of fiber jute. The results of thermogravimetric analysis show that adding 10% of fiber jute decreased the onset temperature of degradation of composite beyond this percentage is found that this temperature remains more or less constant, The stability of fiber jute/composites was better. Keywords: poly (lactic acid), low density polyethylene, jute.