The invention discloses a hearth-care vinegar and a preparation method thereof, each 1000 ml of hearth-care vinegar contains the following components: brewed vinegar, dates, wolfberry, lily, orange peel, longan, fruit juice concentrate, white sugar, fructose syrup, honey, ginger extract, potassium sorbate, and caramel color. The preparation method comprises: adding water to dates, wolfberry, lily, orange peel and longan, extracting and cooling, filtering and obtaining the filter liquid; dissolving honey, potassium sorbate and caramel color into water, obtaining a mixed solution; then mixing the filter liquid, the mixed solution with the brewed vinegar, fruit juice concentrate, white sugar and fructose syrup, then adding ginger extract, adding water to determine the volume; sterilizing the material after determining the volume, then potting. The hearth-care vinegar of the invention has not only good taste and convenient ingestion, and it also has the hearth-care functions of dates, lily, wolfberry, orange peel, longan and honey; the preparation method of the hearth-care vinegar of the invention is simple and easy to operate.