Preparation method of hot-rolled steel plate

The preparation method of the hot-rolled steel plate comprises the following steps that S10, a roller with a good oxidation film is provided; s20, under the condition that the roller has a good oxidation film, the steel plate to be subjected to finish rolling is subjected to finish rolling; and S30, the steel plate obtained after finish rolling is cooled and rolled, and the hot-rolled steel plate is obtained. According to the technical scheme, the roller with the good oxidation film is used for conducting finish rolling on the steel plate, the oxidation film on the roller face of the roller is prevented from being stripped, the situation that iron oxide scale is pressed in in the finish rolling process can be prevented, and therefore the hot-rolled steel plate with the good surface quality is obtained. Meanwhile, according to the technical scheme, the method is particularly suitable for production of the phosphorus-containing high-strength IF steel plate of 2.5-3 mm, stable and efficient production of the pho