The invention discloses 440 MPa-level cold rolling high-strength IF steel. The 440 MPa-level cold rolling high-strength IF steel comprises chemical components which include, by weight percentage, 0.0015%-0.0035% of C, 0.40%-0.50% of Si, 0.75%-0.95% of Mn, 0.08%-0.10% of P, 0.02%-0.03% of Nb and 0.018%-0.035% of Ti. The production method includes the steps that after blast furnace molten iron is subjected to molten iron desulphurization, converter converting is conducted, high-phosphorus molten steel with the end point phosphorus accounting for 0.040 wt%-0.080 wt% is obtained, and a casting blank is poured; the tapping temperature of a hot rolling plate blank is divided according to the thickness specification, the heat insulation time is larger than or equal to 180 min, a rear section is cooled after finish rolling, and the coiling temperature ranges from 700 DEG C to 725 DEG C; the cold rolling reduction rate ranges from 60% to 75%, the continuous annealing soaking temperature ranges from 810 DEG C to 830 DEG C, the slow cooling temperature ranges from 640 DEG C to 660 DEG C, and the aging temperature ranges from 350 DEG C to 380 DEG C. The production cost of the type of steel is low, the texture is uniform, and the forming performance is good.