The invention relates to the technical field of ferrous metallurgy sintering technologies, in particular to a method for iron mine sintering energy conservation and emission reduction. The method comprises the steps that flue gas of a sintering machine (A) is divided into three parts, the first part flue gas is high in NOx concentration, the second part flue gas is high in SO2 concentration, the third part flue gas is high in temperature, the third part flue gas is circulated into a front portion flue gas hood (N) through a first cyclone dust collector (L), the first part flue gas is circulated into a middle portion flue gas hood (R) through a second cyclone dust collector (P), and the second part flue gas enters an outer discharge flue (D) and is discharged by a chimney (I) after penetrating through an electrostatic dust collector (E), a desulphurization device (F), a denitration device (G) and an outer discharge draught fan (H) in sequence. According to the method for the iron mine sintering energy conservation and emission reduction, the high-NOx flue gas of the front portion of the sintering machine is circulated into the rear portion of the sintering machine to enable NOx to gather in the high-sulfur flue gas of the middle portion of the sintering machine, the desulphurization and denitration efficiency is facilitated to be improved, and the investment operating cost of sintering flue gas end treatment devices can be reduced due to the reduction of the flue gas processing capacity.