This paper investigates how the regulation of bank wealth management products (WMPs) affects corporate innovation. We build a concise model linking firms’ assets allocation decisions to regulatory variables affecting banks. The model suggests that current WMP regulation can enhance formal lending and stimulate innovation among state-owned enterprises (SOEs), while having no impact on innovation in private enterprises (PEs). Empirically, we identify firms’ exposure to bank regulation by examining the number of WMPs issued by banks in 2017 and the distance between banks and firms. Our results indicate that innovation output significantly increased for highly exposed SOEs, while there was no significant change for PEs. Using city-level data, we further observe that regulation fosters innovation in regions with higher exposure. Our findings suggest that regulation exerts heterogeneous effects on the real economy by banks’ credit allocation and firms’ investment strategies.