<p>After a large number of equity pledge in the listed companies, there may be excessive investment behaviour and the controlling shareholder encroachment on the company's interests, which will directly affect the liquidity of the enterprise, and may aggravate the liquidity risk of the enterprise to a certain extent. Therefore, after constructing the liquidity risk evaluation model, taking Yinyi as an example, it evaluates the liquidity risk of the enterprise before and after the equity pledge, and puts forward some suggestions, such as strengthening investment management to prevent over investment, improving the internal governance mechanism of the enterprise, optimizing the asset and liability structure of the enterprise and broadening the financing sources.</p>