Via 2004~2014 data, this paper carries out an empirical study on shadow bank’s influence on the stability of Chinese commercial bank system. The result shows that shadow bank has negative effect on the stability of commercial banks, but the effect of different components varies. Hence, China needs to establish a comprehensive, prompt and mutual-shared supervision system, deepen the innovation of commercial banks, stimulate the asset management capability of shadow bank, strengthen the macro prudential supervision and perfect the marketization of interest rate adjustment mechanism.