With the rapid development of science, technology and the gradual information of education, the automatic English essays correction system has received more and more attention. The existing automatic English essays correction system can provide feedback on vocabulary and grammar, but it has a lack of thought expression analysis of English essays. Therefore, it is impossible to comprehensively evaluate whether opinion of English essays is relevant and expression of sentiment is clear. To solve this problem, we propose to analyze the thought expression of English essays by combining sentiment analysis and opinion analysis. Through experiment analysis and verification from the aspects of relevance degree of opinion, sentiment tendency, and thought expression of English essays, the results show the proposed method has a good performance in analyzing thought expression of English essays.