The invention discloses an uninterruptible power transmission inspection protection method. A short-time transmission function is added to a relay protection device, operation on an uninterruptible power transmission menu on a man-machine interface is carried out, after that the open condition is satisfied is determined through a protection CPU, a jump command is issued to an open-in plug-in, after self check of the open-in plug-in passes, an open relay acts, and a tripping contact is closed. The method is advantaged in that through the short-time transmission function of a support on a relayprotection device, the man-machine interface is further utilized for control, the tripping command is emitted by the protection CPU, through an open self check loop, a tripping connection point is outputted through the open plug-in, the path is completely consistent with the path of protecting a jump issuing command of actual operation, in addition, the short-time transmission locking measures under abnormal conditions are researched, and the goal of not affecting the protection function during transmission detection is realized.