Positive Role of AI Model in the Sustainable Development of College English Education from the Perspective of Educational Ecology

With the rise of the concept of ecological education, the sustainable development of English education has steadily become more important to many institutions and universities and have carried out reforms to address the shortcomings of traditional English teaching. Under the influence of computer technology, AI (artificial intelligence) has also made breakthrough progress and has certain applications in all walks of life. However, the computer communication network is also facing serious security risks, and it needs to be combined with relevant technologies to maintain the security of the communication network. In this paper, the concept of ecological education was integrated into college English education, and AI technology was applied to English teaching. By combining support vector machine and principal component analysis, the paper constructed an evaluation index system of English teaching quality, and made an experimental analysis of English teaching quality evaluation. The experimental results showed that the average evaluation accuracy of the five evaluation indexes was 94.06%, and the average evaluation time was 5.06s. It can be seen from the above data that the algorithm in this paper can effectively improve the evaluation accuracy of the system and shorten the evaluation time. This paper also tested the communication network security encryption system, and the results showed that the proportion of decrypted data in the system was less than 4%, which showed that the encryption effect of the system was good.