The development of society and increasing consumption of plastics in the world has been a subject of great concern and special attention by the scientific community. The aim of this research paper to synthesize and characterize Cellulose + PEG added LDPE biocomposite thin film buried in natural compostable soil environment for the period up to 180 days. The Cellulose (CEL) added 7 wt. % PEG/LDPE biocomposite thin films having 10 wt. % of CEL were characterized by weight loss and weight loss percent, UTS and PEB measurements, SEM and XRD before and after degradation in order to study biodegradation of CEL/PEG/LDPE thin film samples under natural environment. The LDPE + 7% PEG + 10% CEL biocomposite thin films after soil burial of 90, 120, 180 days are found to be degraded and makes an eco- friendly and degradable material in natural environment