The invention discloses a barbary wolfberry fruit hot-air drying method using cold ion pretreatment. The hot-air drying method comprises the steps as follows: 1) performing cold ion pretreatment on barbary wolfberry fruits; and 2) performing hot-air drying on the barbary wolfberry fruits treated by the step 1) to realize drying treatment of the barbary wolfberry fruits, wherein cold ion treatmentis performed for 15 s-60 s, the conditions of cold ion pretreatment are as follows: air serves as a cold ion generation source, the distance between a nozzle of a cold ion device and a barbary wolfberry fruit sample is 4-8 cm, the cold ion body flow is 2-4 L/min, the pulsation frequency is 15-30 kHz, and power is 600-900 w. The invention provides the cold ion pretreatment for drying the barbary wolfberry fruits, surfaces of the barbary wolfberry fruits after cold ion treatment can be etched and have micropores, barrier of wax coats on the surfaces of the barbary wolfberry fruits is broken through, and compared with non-pretreated barbary wolfberry fruit samples, the barbary wolfberry fruit sample greatly shortens the drying time and reduces energy consumption. Besides, the rehydration ratio, color and other physical and chemical qualities of the barabry wolfberry fruits are better kept.