The reform of the vertical administration of environmental monitoring and supervision at sub-provincial level is a fundamental reform of the local environmental protection administration system. As a pilot province, the provincial government of Jiangsu has released the reform plan, and began to implement it both at provincial level and sub-provincial level. In this article, 4 problems that might encounter in the reform are summarized. Based on these problems, 5 aspects of the problem countermeasures are set up.