The invention provides a vehicle deviation path detection method and device, relates to the technical field of vehicle path planning, is applied to a
cloud server, and comprises the following steps: determining a target planning path pre-configured for a target vehicle, the target planning path comprising a plurality of path points; in the running process of the target vehicle, the current position of the target vehicle is obtained; in the plurality of waypoints, determining the
waypoint closest to the current position of the target vehicle as a current target
waypoint, the target
waypoint being the waypoint closest to the position of the target vehicle; and under the condition that the distance between the current target path point and the current position of the target vehicle exceeds the
maximum deviation distance, determining that the target vehicle deviates from the target planned path. According to the method, the sensitivity of static path comparison to positioning fluctuation is overcome, even if transient position jump of the vehicle occurs due to
signal interference, stability judgment can still be performed by taking the dynamically anchored nearest path point as a reference, and the
false alarm rate is reduced.