The invention belongs to the technical field of ore processing and particularly relates to a refractory iron ore rotary-kiln roasting and dry-type pre-selected tailing ore-returning-kiln re-roasting method. The method comprises the following steps that crushed iron ores with the particle size being 0-5 mm are graded into the iron ores with the particle size being 0-1 mm and the iron ores with theparticle size being 1-5 mm; through a rotary kiln, the processes that 0-1 mm pelletizing magnetic roasting is conducted and the iron ores with the particle size being 1-5 mm direct enter the kiln formagnetic roasting are conducted correspondingly; magnetic roasted ores are cooled to be 70-80 DEG C to be broken apart and then fed into a spiral dry-type magnetic separator for pre-selecting; pre-selected concentrates enter a grinding selecting system, and pre-selected tailings enter an ore-return rotary kiln for re-magnetic-roasting and are cooled to be 70-80 DEG C to be broken apart similarly and then fed into the spiral dry-type magnetic separator for being pre-selected again in a dry type; and the pre-selected concentrates enter the grinding selecting system, and the pre-selected tailingsare discharged as the qualified tailings. According to the refractory iron ore rotary-kiln roasting and dry-type pre-selected tailing ore-returning-kiln re-roasting method, the problems that refractory iron ores with the wide particle size range enter a kiln for magnetic rotating, so that the quality of sintered ores is uneven, the grade of the selected tailings is slightly high, and the resourceutilization rate is low are solved, and after the refractory iron ores are treated through a closed-path sintering technique, the metal recovery rate is increased by 12%.