The invention provides a web page verification code method based on multiplication ninety-nine. The method verifies the web page by constructing the upper case numeral multiplication operation with the catchy multiplication formula, and takes the user's click action as the precondition to enter the background judgment flow. The dual protection condition effectively ensures that the executor of thesystem is human, not an automatic attack tool. In addition, the result of verification is the single digit value of the normal multiplication result. This rule avoids the attack tools from launchingautomated attacks through the normal numeric operation, thus protecting the security of the website.