Biomass wastes have a significant deal of promise for usage as a non-depleting source of re-newable energy and for the creation of goods with benefit. The world’s attempts to valorize surplus lignocellulose biomass wastes depend on the pretreatment procedure to remove the lignocellulose material’s refractory barrier for access to valuable substrates. Finding an appropriate unit operation for the conversion of biomass into value-added goods. There are many different pretreatment methods available, and research into more affordable, efficient, and ecologically friendly procedures is ongoing. Various studies have shown that a good pretreatment method can reduce the network of strong chemical linkages between the cel-lulose, hemicellulose, and lignin in the biomass. Using high heat and pressure to dissolve the structure, hydrothermal pretreatment is emphasized as a valuable technique in the recovery of lignin. The need for a flexible strategy to meet rising global energy demands has led many academics to concentrate on renewable biofuel made from sustainable resources. There are many challenges that need to be resolved before lignocellulose biomass can be transformed into commercially viable biofuels and bio products. This study also emphasizes the signifi-cance of bioethanol production in light of worries about climate change, technical advances, and prospects for the future.