Secure OTA upgrading method and system

The technical proposal of the invention comprises a safe OTA upgrading method, comprising the following steps: S10, generating an OTA upgrading package in a server; S20, downloading the OTA upgrade package to the upgrade buffer area of the pre-upgrade system from the server; S30, reading the OTA upgrade package from the upgrade buffer area and writing the OTA upgrade package into the system partition of the pre-upgrade system; the OTA upgrade includes a plurality of partition data, and the server embeds a version check data structure including version number information in each partition datawhen generating an OTA upgrade package. The invention has the advantages that: Partitioned data is bound to version-checked data structures, the OTA upgrade progress is judged according to the versionverification data structure in each partition data, and the upgrade progress is prevented from being disturbed. The OTA status flag does not need to be set and modified, so that the OTA status flag can be prevented from being