The current review article investigates the potential for producing highly valuable items solely from agricultural wastes treated with deep eutectic solvents (DES). A thorough explanation of the DES s’ reaction mechanism and biomass-treating capabilities is provided, shedding light on how green pretreatment methods can be applied to agricultural wastes in order to form high-value products. In view of that, the influences of crucial properties of DES like viscosity, density, and recycling ability of DES are well analyzed. This review article's next goal is to compile the most recent developments for the years 2018–2023 on DES-based valorization of agricultural wastes into a range of products, including biogas such as biohydrogen, liquid biofuels like bioethanol and butanol, and platform chemicals and reagents that are followed by novel materials. A discussion of the current criticalities and prospective avenues for further research concluded the paper. For this reason, having a thorough grasp of product value in one review paper from the potential of DES to agricultural wastes will be very helpful to the readers.