The invention provides a method for preparing a titanium-rich material by utilizing high-calcium magnesium-titanium concentrate. The method comprises the following steps that 1) the high-calcium magnesium-titanium concentrate is mixed with pulverized coal, ball milling is carried out, then a binder, an additive and water are added into the mixed powder, and a mixed pellet is obtained through uniformly mixing, pelletizing and drying; 2), the pellet is uniformly paved on a chain grate, and pre-dehydration and pre-heating treatment are carried out correspondingly; 3), the pretreated pellet is fedinto a first rotary kiln for primary reaction; 4), the pellet subjected to primary reaction is fed into a second rotary kiln for secondary reaction, wherein the reaction atmosphere is a mixed atmosphere of hydrogen and nitrogen; and 5), the pellet subjected to secondary reaction is fed into a cooling chamber for cooling, and then crushing and magnetic separation are carried out. According to themethod, the high-temperature environment and the atmosphere environment required for preparing TiCxOyNz through high-calcium magnesium ilmenite reduction nitridation are realized, the production efficiency of the TiCxOyNz is greatly improved, the production cost is reduced, and meanwhile, an ideal raw material is provided for a low-temperature chlorination process.