The invention discloses a running vehicle body color identification method which comprises the steps of: step 1, marking a virtual detection line for a monitor video frame, wherein the vehicle running direction is that the front surface of a vehicle head faces to a camera lens; step 2, detecting a running vehicle in a monitor video frame sequence; step 3, detecting the edge of a to-be-identified vehicle; step 4, carrying out fine segmentation on a to-be-identified vehicle region; step 5, positioning a vehicle body color identification region of the head of the to-be-identified vehicle; step 6, carrying out vehicle body color identification; and step 7, outputting a vehicle body color judgment result of the to-be-identified vehicle. The method is only suitable for vehicles running in a forward direction, suitable for a complicated environment with lots of interferences in a video shot by a monitor camera, simple in step, convenient to implement, small in calculated amount and high in result accuracy.