Abstract: Vanadium-titanium sinter produced by acid pellets and alkaline materials mixed sintering of thick material layer is a new sintering process where high alkalinity and acidity ball are made from the upcoming vanadium-titanium iron concentrate powder and then mixed with fuel and returned ore for further sintering. The experimental results showed that,compared with conventional sintering process,addition of acidic pellets had changed sintered material layer structure which led to the better breathability,improved sinter yield and increasing contents of calcium ferrite and magnetite while reducing hematite and perovskite contents. As a result,the strength and RDI of sinter have been improved.