The text intonation information of Corporate Social Responsibility(CSR) reports of listed companies from 2010 to 2018 was extracted by text analysis method, based on signal theory and accommodation theory, this paper discusses the relevance value of CSR report tone to analysts'prediction. The study found that the net positive tone of CSR reports Reduced Analyst Forecast Bias and analyst forecast divergence, and this effect was more significant when analysts forecast an optimistic bias. Further analysis found that:based on reporting characteristics, the positive effect of CSR reporting tone on analysts' predictions only occurred in the group of mandatory disclosure and non-compliance with sustainability reporting guidelines;based on the characteristics of the analyst, the positive influence of intonation on the analysts' prediction mainly occurred among the less experienced and non-star analysts. The study of economic consequences found that the tone of social responsibility reports alleviated the risk of stock price collapse by reducing analyst forecast bias and divergence. This paper discusses the information content of the tone of CSR reports from the perspective of analyst prediction, which is not only helpful to enrich the academic literature on the economic consequences of non-financial information disclosure and the influential factors of analyst prediction, moreover, the disclosure of CSR reports should be standardized by the regulatory authorities, which can provide useful reference for investors to effectively use the tone information in CSR reports.