Hot rolling multiple production line slab matching control method for improving steel enterprise material utilization rate

The invention relates to a hot rolling multiple production line slab matching control method for improving the steel enterprise material utilization rate. The method comprises steps that, slabs and contracts are grouped to acquire slab contract groups; a to-be-matched relation of a slab and a contract in each slab contract group is determined according to slab-contract specification matching criteria; the slab matching problem is described quantitatively; non-authorized slabs are matched with contracts; the slab matching adjustment problem is described quantitatively; adjustment on matching relations of all slabs and the contracts is carried out to form the final slab matching scheme which is then issued to multiple hot rolling production lines for execution, and hot rolling multiple production line slab matching is accomplished. According to the method, the utilization rate of the non-authorized slabs is improved, energy waste caused by repeated steel making is further greatly reduced, consumption of raw materials is reduced, residual material amount and stock are reduced, optimization matching of the slabs and the contracts in the prior art is carried out according to the matching relation adjustment problem of the slabs and the contracts, contract integrity is effectively improved, the residual material amount and slab cutting loss amount are reduced, and timely delivery of urgent contracts can be guaranteed.