The invention provides a hot rolling load distribution method based on product classification. The hot rolling load distribution method comprises the following steps that incoming hot-rolled slabs are divided into cold-rolled materials and specific steel, a reduction ratio load distribution way is adopted for the cold-rolled materials, and a rolling force load distribution way is adopted for the specific steel; and a function of automatic switching between the two load distribution modes is added in a control system. According to the hot rolling load distribution method, the rolling force and reduction ratio combined type load distribution way is adopted by a finish rolling unit according to the purposes of products based on the characteristics of the hot-rolled products, in this way, on the premise that stable production is guaranteed, the frequency and amplitude of intervention in the load of a rolling mill by an operator are reduced, and the probability that waste steel is generated due to slipping of a machine frame in the preceding stage of finish rolling is reduced.