The invention discloses a pouring system paving method, which comprises: (1) drawing: drawing a two-dimensional picture by using CAD software, wherein the drawing contents comprise a mold placement position border, a gate positioning border, a mold inner gate position size border, a horizontal runner position border and a straight runner position border. According to the present invention, the two-dimensional picture is drawn through the CAD software, the two-dimensional picture is projected onto a working table through a projector, a horizontal runner porcelain tube, a mold, an inner gate porcelain tube and a straight runner porcelain tube are paved, a first pneumatic rod drives an ultrasonic wave sensor to detect the paving of the horizontal runner porcelain tube and the inner gate porcelain tube, the influence of the leakage caused by the non-flat paving on the pouring is avoided, a second pneumatic rod stably inserts the bundled horizontal runner porcelain tube into the inner gateporcelain tube, the whole process is rapid, efficient and stable, different two-dimensional pictures can be replaced according to different molds, the operation can be performed without professionals,the working efficiency is high, and the pouring error cannot be easily generated.