Controversies in normal science from scientific outlook of Thomas Kuhn

In order to deeply grasp the idea of scientific outlook of Thomas Kuhn,the paper,with the help of logic analysis and the historical evidence,analyzes controversies in normal science.The analysis reveals that the scientists,although they do their utmost to resolve puzzles in normal science,have controversies in this stage,and the controversies are not only in the numbers of science community,but also in different paradigm.The paper finds that the roles in normal science stage are different from those of pre-paradigm stage and crisis stage,and it can only bring effect of calcined fright and temper on the criticised paradigm,but cannot lead to scientific revolution.