Accurate coal blending system of silo and coal blending method of accurate coal blending system

The invention discloses an accurate coal blending system of a silo. The accurate coal blending system comprises a coal blending silo, a raw coal in-silo belt conveyor, a silo roof material distribution machine, a coal blending silo bottom belt conveyor, a metering device and a finished coal out-of-silo belt conveyor, wherein a coal inlet of the raw coal in-silo belt conveyor is connected to a storage yard coal blending system, a coal outlet of the raw coal in-silo belt conveyor is connected with a coal inlet of the silo roof material distribution machine, the coal blending silo comprises a plurality of silo tubes, a coal outlet of the silo roof material distribution machine is connected with coal inlets of the silo tubes, coal outlets of the silo tubes are connected with a coal inlet of the coal blending silo bottom belt conveyor, a coal outlet of the coal blending silo bottom belt conveyor is connected with a coal inlet of the finished coal out-of-silo belt conveyor, and a coal outlet of the finished coal out-of-silo belt conveyor is connected with a finished coal storage yard or a shipment system. According to the accurate coal blending system disclosed by the invention, high-accuracy coal blending requirements are met, meanwhile, the coal blending is not limited by the number of storage yard material taking devices, and the coal blending requirements on four or more than four coal types can be met.