The invention relates to a solvent regenerating process and device for crude benzene refining process. When heavy hydrocarbon component content included in a circulating lean solvent is >3% by weight, lean solvent extracted from the bottom of a solvent recycling column is not directly fed into a solvent regenerating column any longer but purified first; the lean solvent is mixed successively with non-aromatic hydrocarbons and water, non-aromatic hydrocarbon and heavy hydrocarbon components are isolated via a two-stage isolating tank, and a water and solvent mixture enters a water stripping column to further isolate non-aromatic hydrocarbons and water; the purified lean solvent is returned to the solvent recycling column through the solvent regenerating column. Solvent purifying process is added before conventional solvent regenerating process, the lean solvent from the solvent recycling column to the solvent regenerating column is purified first when the heavy hydrocarbon component content in the lean solvent regenerated by steam stripping is >3% by weight, and heavy hydrocarbon components in the solvent are removed effectively; the process is simple to perform, utilization rate of the solvent is greatly increased, and economic benefit is improved; heat load and wastewater are not additionally increased, investment is low, and the effect is good.