The present invention discloses a pneumatic ejecting and sucking type delivery conduit, which overcomes a drawback of the prior bulk material conduit air delivery that fan blades affix materials or impurities to impact the normal operation of the production. The conduit consists of a high pressure spray air conduit and a suspending air conduit. The spray air conduit is provided with a high pressure air inlet and a spray outlet. The conduit wall of the spray air conduit is provided with a material sucking opening and an impurity sucking opening. A flow deflector is respectively arranged insideeach of the material sucking opening and the impurity sucking opening. The suspending air conduit is positioned under a material conveying web. One end of the air conduit is connected with the high pressure air, and the other end is sealed. The suspending air conduit is provided with a tuyere in which a flow deflector is distributed. The delivery conduit has the advantages that the materials and impurities enter the conduit through the side of the air delivery conduit behind a blower fan, and the material flow and the impurity flow do not pass through the fan blades, and thus the possibility that dusts and impurities are attached to the fan blades is completely eliminated and the blades are always kept clean. The conduit facilitates stable production equipment, continuous operation, production efficiency improvement and maintenance cost reduction.