Currently, corporate social responsibility draws more and more attention. Therefore, we take the 2008--2012 listed companies in nuclear power and related industries as samples. From the nature of ownership and corporate performance point of view, we study the scope and mechanism about the relationship between the largest shareholder and corporate social responsibility. Through empirical analysis, we found that: the higher the largest shareholder owns, the more possibility corporate social responsibility will be fulfilled ; but in the non-state...