In view of the unfavorable factors of complex preparation process conditions and high production cost of ultrapure iron concentrate and the endowment defects of iron ore resources in China，a magnetite in Chile is taken as raw material to explore the process flow of producing ultrapure iron concentrate from imported iron ore，and carry out single magnetic separation and magnetic-levitation combined process tests. Through the grinding fineness test and the optimization of the beneficiation process，the efficient preparation of ultrapure iron concentrate is systematically explored. The results show that under the condition that the grinding fineness of the raw ore is ＜ 0. 045 mm and the particle fraction is 97. 88% ， the iron ore concentrate with TFe mass fraction of 71. 00% and recovery rate of 93. 60% can be obtained by the weak magnetic separation process of “one coarse and one fine”. The ultrapure iron concentrate with TFe mass fraction of 71. 78% and recovery rate of 60. 93% can be obtained by using the anti-flotation process of“one coarse and two fine”， and its SiO₂ mass fraction is reduced to 0. 272%. The TFe mass fraction of flotation tailings is 69. 11% ，which can be used as ordinary iron concentrate. Due to the low impurity content and simple embedding characteristics of imported high-grade iron ore，the simplified beneficiation process can be used to improve the comprehensive benefits of the process and prepare high-grade ultra-pure iron concentrate with high recovery rate. The purpose of this experiment is to reduce the preparation cost of ultrapure iron concentrate and optimize the preparation process，so as to provide a reference and basis for domestic iron and steel enterprises to produce high value-added products.