A biocomposite is a composite material formed by a matrix and a reinforcement of natural fibers. Environmental concern and cost of synthetic fibres like poly lactic acid have led the foundation of using natural fibre as reinforcement in polymeric composites. Food packaging is defined as enclosing food to protect it from tampering or contamination from physical, chemical, and biological sources. Materials that have occasionally been used in food packaging include biocomposites. This review references more than 110 articles and summaries the up to date developments of PLA nanomaterials applied in the food packaging field, presenting a comprehensive review of various PLA nanocomposites and related technologies used to construct functional PLA food packaging nanosystems.