The present invention relates to a drying method that can reduce the oxidization of the article containing the water. The process device of the method comprises a dryer; a nitrogen input pipe is arranged on the dryer, and a nitrogen storage tank is connected with the nitrogen input pipe; the method steps comprises: firstly the articles are arranged inside the dryer; the nitrogen is filed into thenitrogen; the space inside the dryer is fulfilled with the nitrogen, and the interior of the dryer is kept at a positive pressure; the drying operation of the articles is completed inside the dryer that is fulfilled with the nitrogen; finally the articles are taken out of the dryer. Compared with the prior art, the present invention has the advantages that: 1. when the drying method is applied tothe fresh keeping of the food and to preventing the oxidization, the fresh-keeping time and the oxidation-resistant time of the food are prolonged by two to three times; 2. the original color, fragrance and the taste of the food are maximally maintained; 3. the drying method is free from being harmful to the food and the human body, and the operation is simple and easy to be mastered, and is an environmentally-friendly method for drying and undertaking the fresh-keeping treatment of the food.