By using technology of slag circulation, making full use of the dust, shougang jingtang steel company had made a great progress in low cost product, The product cost by “Full-Tri-De” process reduced sharply than normal process; By using dephosphorization and steelmaking technology of “one key type”, the control level of high drawing speed and constant drawing speed of CCM had been improved, the quality of costing slab had been improved too; at the same time, the cleanliness of steel improved step by step.