Taking IF steel as the research object, considering the influence of the edge temperature drop in the hot rolling process, the coiling temperature was adjusted. The mechanical properties and metallographic structure of hotrolled base material and coldrolled coil were analyzed, and the effect of coiling temperature on the structure and properties of coldrolled products was explored. The results showed that the coiling temperature had little effect on the yield strength and tensile strength of IF steel, the elongation rate increased first and then decreased with the increase of temperature, and the r value was the highest when the coiling temperature was 750 ℃. With increasing the coiling temperature, the mixed crystals and nonuniform structure appeared at the edge of the hotrolled base material, and the cold rolling annealing will aggravate the nonuniform structure phenomenon, resulting in the mixed crystals at the edge of IF steel. The study was of great significance to reveal the internal relationship between IF steel production process and performance, and also had a positive effect on guiding enterprises to formulate lowconsumption and highefficiency rolling process parameters to obtain excellent performance products.