The invention relates to a process for producing crisp green soybean grains and a product thereof, belonging to the field of deep processing of agricultural products. The method comprises the following steps: decapsulating, cleaning, blanching and quickly freezing the green soybeans; predrying the green soybeans by hot air; and finally puffing and drying the green soybeans by airflow to obtain the crisp green soybean grains with high crisp extent and rich flavor. The method furthest maintains the nutrient compositions of the green soybeans, does not add coloring matters and other additives inthe manufacturing process; and the product belongs to purely natural and green food. The preparation method and the practical technology for the crisp green soybean grains provide a new practical wayfor deep processing and utilization of the green soybeans.