English education is of great significance to children's lifelong development. Children's learning habits have a great impact on improving children's English level. In this study, many words were randomly selected from the primary school English teaching content to form the English vocabulary test questionnaire A, and several students were invited to complete the survey. The scores were quantified as three values variable as the measurement of children's English vocabulary level and as the dependent variable of the study. Then, based on the principles of educational psychology, 20 combinations of study habits were selected in questionnaire B, and students and parents were invited to fill in as the independent variables of the study. Finally, an improved Adaboost algorithm was proposed. Based on the training data set, a classification model of children's English vocabulary level and children's study habits was constructed. The F1 score of the model after the 10-fold cross-test was 85.5%. The model pointed out that the characteristics of children with higher English levels include speaking English loudly, often contacting native speakers of English, being willing to communicate with others, often raising questions related to English learning, and often learning English anytime and anywhere.