International Journal of Computational Linguistics Research Qi Wu 15 4 2024 https://doi.org/10.6025/ijclr/2024/15/4/153-160 https://www.dline.info/jcl/fulltext/v15n4/jclv15n4_4.pdf English learning requires much practice to improve students’ comprehensive English application abilities. Online interactive mode for English learning can break time and space constraints. However, there are challenges in matching subjective English questions and English simultaneous typing on online platforms. Therefore, this paper introduces and improves the KMP algorithm in the context of English online interactive mode to enhance its matching performance. Experimental results show that the improved KMP algorithm effectively reduces the number of matches, improves matching efficiency, and demonstrates better application results. Applying the English online interactive mode based on the KMP algorithm effectively helps students improve learning and practice efficiency and promotes learning quality.