The invention belongs to the technical field of humectants for tobacco and particularly relates to a hydrophilic aroma-enhancing humectant Mal-Hyp for tobacco, a preparation method and an application of the humectant. The structural formula of the Mal-Hyp is shown in a formula in the specification. According to the invention, physical humidifying performance test and interior sensory quality of the compound are evaluated, discovering that the humectant plays a role of remarkably improving the physical humidifying performance of cut tobacco and meanwhile has a remarkable improving effect to sensory quality of tobacco, so that the irritation and miscellaneous odors are reduced and the mellow and full sense of the smoke of cigarettes is enhanced.