Method for preparing dry red date and red date produced thereby

The invention discloses a preparation method for red dates by microwave vacuum drying, and red dates prepared thereof. The method comprises the following steps: pretreatment of the red dates, microwave vacuum drying of the pre-treated red dates and packing the red dates which undergoes microwave vacuum drying. The step of microwave vacuum drying to the red dates is as follows: the red dates are put in a microwave vacuum dryer, and the sectional microwave vacuum drying is carried out on the red dates; in the early stage of drying, the degree of vacuum in the drying chamber is maintained between 2 kPa to 15 kPa, the microwave power is selected between 1W/g to 5W/g, the drying temperature is controlled below 50 DEG C, and the drying time ranges from 10 min to 30 min; and in the later stage of drying, the degree of vacuum in the drying chamber is maintained between 2 kPa to 15 kPa, the microwave power is reduced to a magnitude of 0.5W/g to 3W/g, the drying time lasts for 20 min to 60 min, and the water content of the dried red dates ranges from 5 percent to 16 percent. The preparation method has rapid drying, is highly effective, energy-saving, environment-friendly and sanitary, can effectively maintain the original color, aroma, taste, active ingredients and the nutrient content of the red dates and provides the high-quality microwave-vacuum-dried red dates.