Abstract: Based on the experiment of adding nitrogen in nitrogen-containing stainless steels by blowing nitrogen gas, the influencing factors including chemical compositions, temperature, superficial active elements and nitrogen-flow rate to molten steel's nitrogen absorbing were studied. The experimental results show that some alloy elements such as Mn and Cr can raise the nitrogen solubility in the molten steel;the temperature of molten steel increases, the rate of absorbing nitrogen increases correspondingly;the oxygen content in molten steel keeps molten steel from absorbing nitrogen;the nitrogen flow rate increases, the rate of absorbing nitrogen increases correspondingly. And the production process was discussed, which provides reference for adding nitrogen in nitrogen-containing stainless steels steelmaking process by blowing nitrogen gas.