New energy automobile fault data processing method and processing device

The invention discloses a new energy automobile fault data processing method, which relates to the technical field of new energy automobiles. The new energy automobile fault data processing method comprises the steps of: (1) before a fault occurs, storing whole automobile data in an A cache region of a random access memory, and after the A cache region is full, covering and updating original databy using new whole automobile data; (2) when a fault occurs, recording time of fault occurrence, storing fault data in a B cache region of the random access memory, copying the fault data to a C cacheregion of the random access memory for transition at first when the B cache region is full, then storing the fault data in the C cache region into an E storage region of an external expansion FLASH memory, covering and updating original data in the B cache region by using new fault data, repeating the transfer storage action after the B cache region is full of the updated new fault data, and repeating the cycle; and (3) w