Hot rolling method of 3104 aluminum alloy hot-rolled slab

The invention provides a hot rolling method of a 3104 aluminum alloy hot-rolled slab. The hot rolling method comprises the following steps: step S10, carrying out homogenizing heat treatment on a 3104 aluminum alloy cast ingot; s20, the homogenized 3104 aluminum alloy cast ingot is directly discharged out of the furnace to be subjected to hot rough rolling, and a hot rough rolling plate blank is obtained; s30, continuous rolling type hot finish rolling is carried out on the hot rough rolling plate blank, so that a hot finish rolling plate blank is obtained; wherein in the step S20, the total number of hot rough rolling passes is m, in the first m-n passes, the reduction rate of each pass is D1, in the last n passes, the reduction rate of each pass is D2, D1 is larger than D2, and surface oxide skin of the hot rough rolling plate blank is damaged and removed by adjusting the reduction rate of each pass distributed by the rough rolling passes. According to the method, the problem of surface quality defects caus