Investors can go to the fund company official website to check their dividend records. Generally speaking, the foundation will be announced in official website a few days before the dividend. In addition, investors can also judge whether the fund pays dividends through the position share and the change of funds in the account. If the index fund pays dividends in the form of dividend reinvestment, it will increase the holding share of investors. If it is a cash dividend, the funds in the investor's account will increase.