Apparatus and method for realizing primary/standby PCI equipment switchover

A method for realizing switch-over of master/backup PCI device includes carrying out detection on state information of current operation master/backup data processing module by system control module, judging whether operation state of master/backup data processing module is changed or not according to detected state information and sending data message received by channel switch-over module to system interface module connected with current backup data processing module for finalizing switch-over of current master/backup data processing module if it is or otherwise returning back to said detection step.