Vehicle-mounted terminal off-line timing method and system

The invention provides an off-line timing method and system for a vehicle-mounted terminal, and relates to the technical field of timing. Comprising the following steps: editing an executable timing file, and storing the executable timing file; reading the executable timing file, and obtaining target time; real-time clock information of the clock chip is read, and real-time clock time is obtained; and comparing the target time with the real-time clock time, if the target time and the real-time clock time are the same, not performing time calibration, and if the target time and the real-time clock time are different, resetting the real-time clock time as the target time. Through the offline upgrading mode, the problem of time calibration when the vehicle-mounted terminal works offline is solved, the real-time performance and accuracy of data recorded by the vehicle-mounted terminal are guaranteed, and the problem of time error of subsequent data processing is eliminated. 本发明提出了一种车载终端离线校时方法及系统，涉及校时技术领域。包括以下步骤：编