Capital is the first driving force for the development of market economy. As the pioneer of privatization and market‐oriented reform in China and the important birthplace of market economy, Wenzhou mode has developed and expanded. It can be said that without the financing of funds, there would be no private small and medium‐sized enterprises in Wenzhou today. CAS22 has significantly adjusted the classification of financial instruments, and changed the measurement of financial investment from four to three. The model of financial instrument impairment has also undergone earthshaking changes, from the model of incurred loss to the model of expected loss. The financial industry is the most affected by the revision of financial instrument standards. In this context, it is of great practical significance for the long‐term development of private enterprises to study the impact of new financial instrument standards on their financing.