The back-kiln turning machine is an auxiliary equipment for the operation of cooked dough. The turning radius of the back-kiln turning machine and the size and length of the cone roller are determined according to the product specifications and the width of the firing kiln. The size of the product determines the size and distribution density of the cone roller. The cone roller is connected with a universal cross-head and driven by helical gears. This structure is the most stable structure on the market. The processing accuracy of the cone roller will affect the turning angle of the cooked dough. The number of motors must be reasonable. The electronic control is segmented by the PLC program to interlock the upper and lower processes.