<p>Currently, English has become a globally recognized language, and people are very concerned about the quality of English teaching. In traditional English teaching classrooms, listening tests and oral teaching methods are relatively boring, causing students to lose interest in learning English oral skills. Therefore, this article proposes a virtual interactive English speaking training system based on microphone array sensing and data encryption. Firstly, this article analyzes the sensing principle of microphone arrays and constructs a set of fiber optic microphone arrays, which have a relatively simple structure and low equipment requirements. Secondly, this article also provides an overview of a Multi Band Excitation Speech (MBE) algorithm, which differs greatly from previous speech algorithms. This speech algorithm uses a fully parameterized model and does not require residual prediction. And the complexity of the algorithm has not significantly improved. At the same time, a speech data encryption scheme based on the hierarchical attributes of the ciphertext strategy was also proposed. Finally, this article utilizes microphone array sensing and data encryption algorithms to construct a virtual interactive training system for English speaking, which can be used to solve some difficulties encountered in actual English speaking teaching.</p>