The invention discloses a data writing method, device and equipment based on a Flash memory and a storage medium. The method comprises: obtaining a mapping relation table of mapping relations betweenphysical pages storing actual data and logic pages in the Flash memory in advance; when the to-be-written data needing to be written into the target logic page exists, obtaining an idle physical page;erasing the idle physical page, and writing the to-be-written data into the idle physical page; and updating the logic page corresponding to the idle physical page by utilizing the target logic page,and updating the mapping relationship table. According to the method, in the data writing process, only one-time erasing and writing operation needs to be executed, that is, the erasing and writing frequency needing to be executed in the one-time data writing process is reduced, so that the data writing efficiency of the Flash memory is improved, and the service life of the Flash memory is prolonged. Moreover, the method avoids setting a backup area, so that the use efficiency of the Flash space is improved.