The WGD multi-layer belt dryer manufactured by Jiangxi Food Machinery Research Institute is a new dryer developed based on the WG belt dryer. It is suitable for dehydrated vegetables, Chinese herbal medicines, aquatic products, and chemical products. Such as sheet, strip, block material drying. The machine consists of a conveying device, a drying room, a rack, an air-blasting device, an exhausting device, a waste heat recovery device, and an electric control cabinet. Stainless steel mesh belt, multi-layer reciprocating conveying, uniform thickness of spreading material, stepless adjustment of mesh belt running speed, stratified air intake, subsection wetting and drying, reasonable structure, small footprint, high productivity, and significant energy saving effect. To achieve the advantages of cold discharge.