It is suitable for pneumatic transportation of powdery materials such as cement and alumina. It is also suitable for pneumatic conveying devices of other powder and granular materials. An Air slide belt is in the middle of a chute. Powder material will come into the chute above Air slide belt. Material will flow to the chute lower side as pneumatic blower down Air slide belt. The product is spread between the material and the air chamber, the following is the gas chamber, the above is the material, under the action of air pressure through the product, the material fluidized, so as to achieve the purpose of transport.