Disclosed herein is a method of manufacturing citrus snacks. In this method, citrus fruits are sliced in a natural state and dried under reduced pressure so that the citrus fruits may be dried while containing the same nutrients as when fresh, thereby avoiding nutritional damage due to high temperature drying. Further, the citrus fruits containing various nutrients are provided to users in a snack form that allows more convenient ingestion, so that the citrus fruits may be easily ingested by children and the elderly to whom the supply of nutrition is essential.