Safe non-inductive OTA refreshing method for vehicle body control ECU

The invention belongs to the technical field of BCM (Body Control Module) control firmware upgrading, and particularly relates to a safe non-inductive OTA (Over the Air) refreshing method for a vehicle body control ECU (Electronic Control Unit), which comprises the following steps of: S1, equally dividing an ECU flash memory into an execution area and a programming area, and equally dividing a program memory into a surface A and a surface B corresponding to the execution area and the programming area by an MCU (Micro Control Unit); s2, in the normal operation period of the vehicle, the program of the execution area is executed; s3, the ECU flash memory is divided into two independent areas including an execution area and a programming area, seamless updating is allowed, and normal operation controlled by the BCM is not interrupted; s4, mapping the address of the flash in the original application program linker to the A surface; s5, address mapping is switched to call a newly written starting address code, and