The invention discloses a method for excluding false alarms in track foreign body invasion identification. The method includes the following steps that: (1) a video image is obtained rapidly; (2) preliminary processing is performed on the collected video image; (3) two track paths are obtained; (4) the dynamic envelope lines of a train are drawn; (5) a training mode is started, and when it is confirmed that foreign body invasion does not occurs in an environment, an identified foreign body is defined as a device on tracks, image features are extracted and are stored in an false alarm feature library; and (6) in the normal operation mode of the train, image blocks are selected from the dynamic envelope lines from near to far according to the track paths, and feature comparison is carried out on the image blocks, and therefore, whether foreign body invasion occurs can be determined. With the method of the invention adopted, the possibility of false alarms in the track foreign body invasion identification can be decreased, the possibility of mistaking devices and signboards at middle or at two sides of a track for foreign body invasion can be decreased, and therefore, the accuracy of the identification can be improved, and the normal and orderly operation of the train can be ensured.