As financing in China's capital market and bond market is not yet universal, most companies obtain funds for their operations by borrowing from creditors. Strengthening the protection of creditors' interests can directly improve the company's ability to indirect financing, so protecting the interests of creditors is of great significance to the company. From the perspective of the impact of the quality of accounting information on the creditor's decision, this article explores the role of accounting conservatism in the protection of creditors. Accounting conservatism is an important indicator for measuring the quality of accounting information, which can actively and effectively promote the signing of debt contracts. Therefore, in order to better protect the interests of creditors and promote the vigorous development of a socialist market economy with Chinese characteristics, it is necessary to further improve the corresponding laws and regulations, strengthen the construction of a good market financial regulatory environment, and continuously regulate the current status of China's credit market operation.