Journal of E-Technology Zhe Zhang 16 1 2025 https://doi.org/10.6025/jet/2025/16/1/27-34 https://www.dline.info/jet/fulltext/v16n1/jetv16n1_4.pdf Online interactive teaching mode is one of the important ways for modern universities to achieve effective teaching. To enhance the reliability of the effectiveness evaluation of online interactive teaching mode, this paper constructs a college English online interactive mode effectiveness evaluation model based on big data mining algorithms. The model achieves effective data preprocessing and results inthe ranking of evaluation data based on the teaching effectiveness evaluation system. The experimental results show that the proposed English online interactive mode effectiveness evaluation model has lower evaluation result error, better reliability, authenticity, and flexibility, and better fits the actual evaluation results of the English online interactive mode.