The invention provides a low-carbon hot-rolled pickling plate for an automobile and a preparation method of the low-carbon hot-rolled pickling plate. A steel plate is prepared from the compositions inpercentage by weight: 0.03-0.08% of C, less than or equal to 0.05% of Si, 0.1-0.25% of Mn, less than 0.012% of P, less than 0.005% of S, 0.050-0.080% of Als, less than 0.003% of N, and the balance ofFe and unavoidable impurities, wherein Als/N is greater than or equal to 20. The preparation method comprises the steps of molten iron pretreatment, converter smelting, LF refining, calcium treatment, continuous casting, slab heating, coarse rolling, finish rolling, coiling, uncoiling, welding and pickling. By applying the low-carbon hot-rolled pickling plate for the automobile and the preparation method thereof, the defect of cross creases in an uncoiling process is eliminated, the defect of the cross creases of a product does not need to be eliminated by adopting a leveling procedure, equipment is simple, and the cost is low.