By analyzing the data of the Ashare listed companies in China from 2006 to 2013，this paper empirically examines the effect of cultural heterogeneity on analyst's earnings forecasts.The results show that there is significantly negative correlation between cultural heterogeneity and the analysts' earnings forecasts quality and that information transparency has very much limited effect on the correlation of the two.Further test results show that the improvements in traffic convenience in the region undermine the negative impact of cultural heterogeneity on analyst's earnings forecasts.This study not only enriches the relative literatures of “culture and finance”，but also provides new empirical evidence for investors，regulators and other stakeholders to better understand the behavior of analysts.