It is widely acknowledged that Chinese EFL learners’ academic cognition in English writing is difficult to develop efficiently in traditional classroom teaching. To solve this problem, this research explores a digital teaching path of English academic writing based on the Bb-JiTT Model as a fusion innovation of just-in-time teaching on the digital teaching platform Blackboard. It aims to answer two questions about whether the model-based teaching could develop the learners’ academic cognition in English writing, and to what extent it can improve their academic writing abilities. A teaching experiment in English writing was conducted for one semester, in which a questionnaire and writing tests were designed to examine two questions, respectively. The research results show a statistically significant difference in the average scores of the questionnaire survey and writing tests from the experimental class before and after the Bb-JiTT model-based teaching of English writing, whereas there is no such difference from the controlled class. It indicates that a digital teaching approach is of high pedagogical value in enabling the development of EFL learners’ academic cognition in English writing.