Flat bottom-pouring or top-pouring technology is traditionary casting technology for cylinder head casting with big plane being placed up or down.With the development of casting technology,some new casting technologies appear,for example side casting technology.Casting is placed vertically,the big plane of casting is in side position and can avoid being baked not be baked for a long time by molten iron.A lot of production practice has proved that side casting technology is very successful in the application of cylinder head.