Fault control method and fault control device for differential lock and vehicle

The invention discloses a fault control method and device for a differential lock and a vehicle, and the method comprises the steps: obtaining the switching state of the differential lock and the communication transmission state of a vehicle operation state signal; if the vehicle operation state signal is not received in continuous n periods, determining that the communication transmission state is in a fault state, and n is greater than 1; if it is determined that the switch state of the differential lock is in the non-open state, current fault information is recorded according to the fault state, and after it is determined that the switch state is switched from the non-open state to the open state, a fault prompt signal is sent according to the current fault information so as to remind the differential lock of functional faults. By adopting the method, the problem of complaint caused by reporting the fault of the differential lock when the differential lock function is not used by a user can be effectively