The invention relates to a processing method for playing back an ATS subsystem, which comprises that: playback data passes through a playback data file combination module, and then enters a forward playback control module or a reverse playback control module and a playback speed control module in order, and finally is displayed on a playback content display module. Compared with the prior art, the method has the advantages of really reproducing the field scene before and after a fault, providing help for system maintenance personnel to search and analyze the fault, and the like.