The invention belongs to the technical field of metallurgy, and particularly relates to a method for producing a 490MPa level acid-washing-free hot rolled steel plate. The method comprises the following steps of: heating a continuous casting billet; hot rolling; cooling; reeling, and the like, wherein the billet comprises the following chemical compositions in percentage by weight: 0.04-0.11 percent of C, 0.13-0.27 percent of Si, 0.9-1.30 percent of Mn, 0.001-0.007 percent of N, 0-0.027 percent of P, 0-0.017 percent of S, 0.01-0.09 percent of Al, 0.013-0.027 percent of Nb, 0.004-0.012 percent of Ti and the balance of Fe; the heating temperature of the billet is 1,200-1,240 DEG C, the initial rolling temperature of the hot rolling is 1,120-1,220 DEG C, and the finish rolling temperature is 870-910 DEG C; front-section laminar flow water-cooling after rolling is used by the cooling step; and the temperature of the reeling step is 550-585 DEG C. In the invention, the yield strength of a finished steel band product obtained by the method is larger than or equal to 380MPa, the tensile strength is larger than or equal to 490 MPa, the elongation is larger than or equal to 17 percent, the cold bending property is good, and the proportion of Fe3O4 in an oxidized iron sheet on the surface of the finished product exceeds 80 percent.