The invention relates to cigarette additive field, specifically preparation and application of an aroma-enhancing humectant for cigarette capable of elevating cigarette smoking taste quality and keeping tobacco shred moisture, more specifically relates to a Nephelium lappaceum aroma-enhancing humectants, a preparation and use thereof. Aiming to overcome the shortages of easy loss of tobacco shred moisture and poor smoke quality, the invention provides a Nephelium lappaceum aroma-enhancing humectant, to obviously enhance smoke aroma, improve smoke taste, and keep tobacco shred moisture. The invention has low cost, simple process, no change of existing cigarette production process, extraction from natural plant, and significant marketing and application prospects.