Abstract: At present, the academic circle mostly evaluates the influence of academic journals from the static perspective, and lacks relevant research from the dynamic perspective. With the the principle of Newton’s second law in mind, this paper aims to explore the indexes and methods for evaluating the dynamic influence of academic journals, and to study it from three perspectives——the impact speed, acceleration and impact strength. Taking CSSCI economics journal as the research object, and based on the citation database of CNKI, it conducts the correlation analysis, regression analysis and Kappa consistency test, and reveals in the end that impact strength 1) can be used as a new journal evaluation index; 2) has a good distinction; and 3) has a positive correlation with h index and citations per article. The paper thus proposed to evaluate journals based on impact speed, acceleration and impact strength.