Method for producing secondary cold-rolling tinning original plate

The invention discloses a method for producing a secondary cold-rolling tinning original plate. The method comprises the following steps: after desulfurizing the molten iron, carrying out repeated blowing smelting and vacuum processing by a convertor and then controlling the weight percent of the chemical components of a steel product to meet the following proportion: 0.05-0.13% of C, at most 0.030% of Si, 0.60% of Mn, at most 0.020% of P, at most 0.050% of S and the balance of Fe and unavoidable impurities after hot rolling; washing the steel product by dilute acid, then carrying out cold rolling for the first time by an HC rolling machine, adding up the relative draught and controlling at 85-90%; then, annealing in a full hydrogen furnace enclosure type and controlling the annealing temperature between 510 DEG C and 560 DEG C; afterwards, carrying out cold rolling for the second time by the HC rolling machine, adding up the relative draught and controlling at 30-40%; and finally, obtaining the secondary col