The invention discloses a hollow plum fruit preservation method, a preservative and a preparation method thereof. The preservation method realizes preservation mainly by combining coating and deoxidization. The invention further provides a fruit preservative for treating picked hollow plum fruits. The preservative is divided into a coating preservative and a deoxidization preservative, wherein the coating preservative contains 10g of chitosan, 15g of citric acid, 1.0g of vitamin C, 1g of zinc oxide and 200mg of thiourea; and the deoxidization preservative contains 50g of potassium permanganate, 20g of anhydrous sodium chloride, 10g of sodium hydroxide, 15g of zinc oxide, 20g of ferrous sulfate, 15g of vitamin C, 60g of calcium chloride, 15g of sodium polyacrylate and 500g of zeolites. The preservation method comprises the steps of picking fresh hollow plum fruits, treating with the coating preservative, spreading and drying in air for 3-4h, then packing in storage bags in a separating manner, adding a part of deoxidization preservative into each bag, and preserving in a cool environment with the temperature being less than 25 DEG C. According to the preservation method, safety, efficiency and convenience are realized, the quality of hollow plums can be kept, and the rotting rate of the hollow plums can be effectively reduced at the same time.