The relationship between cost stickiness and management''s voluntary profit forecast were empirically studied.?It is found that cost stickiness increases the tendency and frequency of management to issue voluntary profit forecasts. At the same time, the degree of cost stickiness is positively correlated with optimistic profit forecasts and negatively correlated with pessimistic profit forecasts.?The impact mechanism shows that cost stickiness affects the voluntary earnings forecast disclosure of management by improving the degree of information asymmetry and business risks.?Further research finds that government subsidies strengthen the relationship between cost stickiness and management''s voluntary earnings forecast disclosure, corporate social responsibility and economic policy uncertainty weaken the above relationship between the two.?However, government subsidies, corporate social responsibility and economic policy uncertainty have no significant impact on the relationship between cost stickiness and the nature of management''s voluntary profit forecasts.?In addition, the impact of cost stickiness on the management''s voluntary profit forecast is more significant in non-state-owned enterprises and non internationally audited companies.Finally, the increase in the disclosure of management''s voluntary profit forecasts has reduced the cost of equity capital and increased the value of the enterprise.The findings of this paper enrich the research on the economic consequences of cost stickiness and the influencing factors of voluntary disclosure of information, and provide evidence about the discretion and management incentives of management in influencing the disclosure of enterprise cost structure and profit forecast information.