<p>In recent years, solid waste including plastics and biomass waste has been increased day by day, which causes environmental pollution. In order to transform these wastes into a useful energy co-pyrolysis process, can be employed to produce better quality fuels. In this research investigate the utilization of waste solid biomass (wood chips) and waste plastics comprising of higher density polyethylene and low-density polyethylene are used to convert useful products. The feedstock characterization such as ultimate analysis, proximate analysis and thermo gravimetric analysis of the feedstock shows that synergistic energy can produce from co-pyrolysis than pyrolysis process. The highest pyrolytic oil yield is achieved of 80.32 wt% at 350 °C. The impacts of certain operational factors on co-pyrolysis yield including mixing ratio and pyrolysis temperature with wood chips and waste plastics are investigated. The gross calorific value of co-pyrolysis oil has 34.77 MJ/kg which is 21% higher than woods chips pyrolytic oil and 9% than waste plastic oil. The fuel produced by the pyrolysis and co-pyrolysis of biomass woodchips and waste plastics is subjected to performance and emission testing. The experiments showed better results in performance and emission behaviour for co-pyrolysis process. The BTE of pyrolytic oil is 28.4%, which is 4.69% lower than diesel and it is 2.95% higher than traditional biomass pyrolysis. The co-pyrolysis of wood chips biomass and waste plastics (HDPE, LDPE, etc.) is more advantages than traditional pyrolysis. It is also a cheap, practically viable and optional way to improve waste management, boost a country’s energy security and minimize the fossil fuel dependence.</p> Graphical abstract <p></p>