This invention provides a freshness preservation method of fruit and vegetable type agricultural product. A packing bag is first prepared and the fresh fruit and vegetable type agricultural product is put into the packing bag which is then sealed up. After the fruit and vegetable type agricultural product consumes oxygen under the breathing action and continuously produces carbon dioxide to fill up the packing bag, the amount of oxygen contained in the packing bag is relatively reduced. When the packing bag is full of carbon dioxide and the air pressure in the packing bag is larger than that outside the packing bag, the excessive carbon dioxide can be exhausted to the outside of the packing bag through a unidirectional ventilation valve, so as to achieve the effect of inhibiting the breathing action of the fruit and vegetable type agricultural product, thereby constructing the method of the present invention.一種蔬果類農產品之保鮮方法,備妥包裝袋且將新鮮的蔬果類農產品放入包裝袋內密封,待蔬果類農產品在呼吸作用下耗氧,且不斷生成二氧化碳而充滿包裝袋內,令包裝袋內的含氧量相對減少,且當包裝袋內充滿二氧化碳而氣壓大於包裝袋外的氣壓時,過飽之二氧化碳可由單向透氣閥排出包裝袋外,達到蔬果類農產品呼吸作用抑制的效果,藉此構成本發明。1‧‧‧包裝袋11‧‧‧容置空間12‧‧‧單向透氣閥2‧‧‧蔬果類農產品3‧‧‧乾燥物
