Abstract: Because in practice the item and the number of environmental standards in crossprovince key regions are not unified, which leads crossborder NIMBY risk: the regional atmospheric pollution and “I protect, but you pollute”, “Environment Protection Law” and “Atmospheric Pollution Prevention Law” all require to unify the regional standards. However, the particularity of the subject of local environmental standards and the regional administrative fragmentation create both subjective and objective resistances to the unification of standards. The theory of regional public goods not only acts as the theoretical foundation of unified standards, but also shows the necessity of unified standards. The core of unified crossprovince atmospheric environmental standards is how to unify, and to let “unity” fall to the ground. There are two key elements in the process: the granting and the execution of the standard formulation power. After analyzing the key elements, we conclude that there are two feasible modes in China: one is to let the Ministry of Environmental Protection unify the standards; the other is to establish regional coordination organizations lead by the ministry to coordinate the provincial governments in key regions to formulate the same atmospheric environmental standards.