In this research, the impact of environmental uncertainty on the relationship between stock liquidity and stock dividend was investigated. To achieve this goal, in this research, the hypotheses were tested using a statistical sample of 108 companies admitted to the Tehran Stock Exchange, which includes 630 observations between the years 1390 and 1395. In order to measure the liquidity, the indicators (Amihood illiquidity ratio, number of stock trading days, number of transactions, frequency of stock turnover and the gap between bid and offer prices) were used. And in order to measure the dividend, the ratio of dividend paid per share to profit per share was used, and (yield and sales volatility) was used to measure environmental uncertainty. The results of the research showed that environmental uncertainty based on sales has an effect on the relationship between the gap between the bid and offer prices and the stock dividend. On the other hand, the environmental uncertainty based on returns has a positive and significant effect on the relationship between the number of transactions, the gap between bid and offer prices and stock dividends.