The invention relates to a Hanfu apple slice and a preparation method thereof. The fresh Hanfu apple is used as a raw material, cleaned by ultrasonic ozone combination technology, peeled by high-pressure steam, seeded, cut, color-protected, drained, and infrared Enzyme dehydration, plate pre-freezing, vacuum freeze-drying, sorting, metal detection and vacuum filling nitrogen packaging. Advantages of the present invention: without adding any preservatives, it can maintain the original shape, color and taste of Hanfu apples, and has incomparable advantages compared with other drying methods, that is, it can retain the heat-sensitive nutrients in food to the greatest extent, and freeze-dry Hanfu apples. Apples can be stored for 1 to 2 years without deterioration under vacuum nitrogen-filled aluminum packaging conditions. They are pure, safe, natural and hygienic. Therefore, through the application of vacuum freeze-drying technology for apple processing, the quality of my country's export apples will be improved, higher added value will be obtained, and a new growth point of the national economy will also be formed.