In view of the problems of weak coupling in certain stage between sintering ore blending and production performance as well as the lack of scientific evaluation method for the use effect of Masteel Iron & Steel, the high temperature characteristic of common iron ore powder used in Masteel Iron & Steel is studied based on n(Fe₂O₃)/n(CaO) method (N-value method). The results show that, using the high temperature parameter determined by N-value method to optimize the current sintering and ore blending software with high temperature characteristics of iron ore, establishing the ore blending assessment prediction model based on the negative pressure of the sintering process, solid fuel consumption, and yield characteristics index, and constructing a comprehensive characteristic index (S) and the T value of significance of the influence of each factor on the characteristic index, which can guide the optimization and adjuion of sintering ore blending and sintering process operation parameters within the process allowance, and form a certain support for the actual effect of sintering production and ore blending.