This continuous air flow dryer is especially suitable for drying heat sensitive materials, such as sawdust, rice husk, ground wheat kernels, grinded cotton/corn stalks, etc. Air flow dryer machine can also be used to dry grains; the dryer is used to dry materials with a moisture content of 30% to 60%. Air flow dryer can reduce the moisture to 8-12%. Put a small amount of material into the hopper, the hot air produced by the boiler is mixed with the wet material, and then the exhaust blower (fan) is quickly sucked into the pipe. Then, the hot air flows through the curved pipe of the dryer and the air intake (drying chamber), so that the wet material is dried, and the dried material is discharged from the outlet through the air lock.