Abstract: Ingot mold for forging rolling composite is a kind of ingot mold with. high efficiency, low cost and wide application. Based on the experience of ingot production at factory and the design principle of ingot mold, the parameters such as ingot taper, aspect ratio, cap volume ratio and ingot mold thickness are designed, and a 5. 5 ~7 t ingot mold for forging and rolling composite is developed. The production practice shows that the ingot mold with design parameters of 3. 8% ta¬per, 2. 0 ~ 2. 5 height-width ratio ( adjustable cap opening) , 12. 5% cap-volume ratio, upper thin and lower thick wall thickness (upper 150 mm, lower 175 mm) has obvious effect on improving ingot quality and the forging yield increases from original 83. 0% to 85. 0%.