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Medium-Low Carbon ferrochrome smelting is a complex process. The discretion of the impurity content of phosphorus is an important factor affecting the quality of Ferrochrome products. The important influence factors of converter smelting ferrochrome end-point phosphorus content was concluded based on analyzing response characteristics of hot metal dephosphorization pretreatment and thermodynamic condition, the control variables of the end phosphorus content was fixed; According to Sinosteel Jilin Ferroalloys co., Ltd converter smelting medium and low carbon ferrochrome technology and production data, a prediction model for converter smelting ferrochrome end-point phosphorus content has been established based on RBF artificial neural network in accordance with the ferrochrome smelting process for online prediction of end phosphorus content. Results show that the hit rate of the prediction model is 85.7% with the error ±0.003%, provides important theoretical basis for the improvement of smelting process and product quality.