Method for improving accuracy of on-board MP5 time

The invention relates to the vehicle MP5 technology field and particularly relates to a method for improving accuracy of the vehicle MP5 time. The method comprises steps that the standard time of a vehicle MP5 is set; the time of the vehicle MP5 is manually adjusted after the certain time period to make the time be the same as the standard time; deviation between the time of the vehicle MP5 and the standard time per unit time is obtained through calculation; a time compensation period is set; the compensation time for adjusting the vehicle MP5 in each compensation period is calculated based onsteps S300 and S400; the time of the vehicle MP5 is automatically compensated and adjusted according to the compensation time in each compensation period. The method is advantaged in that a technicalproblem that the existing vehicle MP5 without GPS time synchronization has time deviation is solved. 本发明涉及车载MP5技术领域，尤其涉及种改善车载MP5时间精准度的方法，包括以下步骤：在车载MP5上设定标准时间；特定时间段后，手动调整车载MP5上的时间，使之与标准时间相同；计算得到单位时间内，车载MP5上的时间与标准时间之间的偏差值；设定时间补