HGS (originally called SSJ) series tunnel dryer consists of drying room, trolley, tray, heat exchanger and the electrical controller. This series dryer is suitable for drying large products which need long drying time and have a high requirement on appearances, such as fungus, mushroom, tremella, hericium erinaceus and other fungi; ginger, dried persimmon, dried jujube and other agricultural products; mango, litchi, longan, plum, cherry tomato and other fresh fruit; star anise, Chinese angelica, ginseng, maca, Cordyceps Sinensis, pilose antler and other Chinese medicines.