The e-CNY, with its information transparency and financial inclusion, activates an innovative solution to cure the financing obstacles among the small and medium enterprises in China. The research establishes a game model between enterprises and commercial banks embedded in information asymmetry, and incorporates the e-CNY payment choice within the framework to analyse the cure effect of e-CNY on enterprise financing obstacles. With equilibrium results calculated, it simulates the outcomes of changing parameters on the behaviours of enterprises and banks. The findings involve that, based on the incremental utility of e-CNY and subsidies attached, e-CNY is preferred in transaction, reducing the bad debt risk caused by misalignment when both achieving excess returns. The People’s Bank of China must strengthen a more transparent publicity of e-CNY and structure an inclusive system of financial regulation to well use digital currency and realise high-quality socio-economic development.