The invention discloses a pouring method and a pouring system used for a plate-shaped ball iron casting. The method adopts a sand casting technique; the pouring system comprises a sprue cup, a sprue, a horizontal runner and a plurality of plate-shaped castings; the method adopts a type that the large plane of the plate-shaped casting is vertically arranged in parallel; the horizontal runner and the plate-shaped casting form a narrow seam edge gate so as to lead the molten steel to flow in along the wall and be stably filled from bottom to top during the pouring process. When the method and the pouring system of the invention are adopted, the molten steel is filled along the wall during the pouring process and the metal is sequentially solidified from bottom to top, thus ensuring the uniformity and consistency of the metallographic structure of the plate-shaped ball iron casting; furthermore, by the narrow seam edge gate, the pouring time is prolonged, the shrinkage compensation effect is provided during the pouring process, furthermore, the slag retaining effect is good and the defects such as slag inclusion, sand inclusion, etc. are avoided; the plate-shaped ball iron casting pouring system of the invention has reasonable and simple structure, saves the metal and has high process yield; furthermore, the pouring system is convenient to be removed; the casting adopts serial pouring, thus having small land occupying and high production efficiency.