The invention provides a dialog box pop-up method for submitting big data by adopting POST, which belongs to the technical field of information processing and comprises the following steps: separatinga URL (Uniform Resource Locator) to be submitted to a server background from the big data, and submitting complete data to the background by adopting a POST submitting mode, so that the data volume and the data length of the complete data are not limited; And creating a pop-up dialog box with a format, and automatically popping up the dialog box with the format for data display after the POST submits data execution. According to the method, a POST dialog box is adopted for data display, the problem that the data length is limited is solved, and meanwhile the reusability and maintainability ofcodes are improved. And the method is particularly suitable for a business scene in which the data size is large and a data query result needs to be displayed by a pop-up box to the background.