The invention discloses a double-type air-distribution plate and single pipe discharging sending tank. The sending tank comprises a tank body with a cylindrical upper half part and a conic lower half part and is characterized in that: the conic lower half part is provided with a main fluidifying air chamber and an auxiliary fluidifying air chamber; the auxiliary fluidifying air chamber is sleevedoutside the main fluidifying air chamber; and a main fluidifying air distribution plate and an auxiliary fluidifying air distribution plate are arranged in the main fluidifying air chamber upwards sequentially. The double-type air-distribution plate and single pipe discharging sending tank improves the utilization rate of inner spaces of the conventional sending tank and effectively prevents internal pulverized coal from bridging. Two different forms of air-distribution plates, namely umbrella hoods are used to control the sizes of fluidifying areas, so that the delivery with higher solid/gasratio can be realized. The adjustment in a lager solid/gas ratio range can be realized by adjusting two flows of fluidifying air, pressurizing air and supplementing air.