OTA upgrading method and device of terminal equipment, electronic equipment and storage medium

The embodiment of the invention provides an OTA upgrading method and device for terminal equipment, electronic equipment and a storage medium, and the method comprises the steps: obtaining a main application upgrading package of a main application of the terminal equipment, carrying out the system signature of the main application upgrading package, upgrading the main application to a target version according to the main application upgrading package, and loading the OTA application through the main application of the target version so as to carry out firmware upgrading on the terminal equipment through the OTA application. In the embodiment of the invention, the main application of the terminal equipment is upgraded to the target version, and the OTA application is loaded through the main application of the target version, so that an OTA upgrading channel of the off-management terminal equipment is opened, and the problem that the terminal equipment cannot be managed, and then firmware version iterative upgr