The type, morphology and distribution of the inclusion in tire cord steel at each operation position of LD-LF-VD-CC production process were investigated. The result shows that it is bad for desulfurization to add refining slag during LD tapping, but it provides conditions for pre-slagging and inclusion modification in the following process. In order to gain a good plasticity of inclusion, neutral slag was used during refining process, it is forbidden to use bauxite at adjusting slag process, and the basicityof final slag was required at 0.9～1.1. Through analyzing the large inclusion, it can be found that most composition of inclusion is SiO₂-Al₂O₃ and a small portion include Na₂O and K₂O. It should be involved refractories. Therefore, it is very important to use high quality refractories and control temperture of the molten steel and casting speed.