The newly ingathered corn with high moisture will cause severely mildew problems, if it is not dried in time during harvest, which affect the farmers' income. The new grain bin, combined steel mesh drying grain bin, which was suitable for farmers to air and store grain safely, was analyzed and evaluated by the methods of airing and overturning grain, detecting humidity of environment and corn stack, moisture, fungi spores etc, which provide theoretical basis for popularization and application of the bin.