Locking device of split stander

The utility model relates to a locking device of a split stander, which relates to steel pipe rolling machines, and solves the technical problems of a traditional locking device that the occupied space is large and unreliability in locking exists. The locking device comprises an upper stander and a lower stander as well as a locking oil cylinder which is installed on the upper stander, and the locking device is characterized in that the protruding end of the locking oil cylinder is connected with the end of a locking end through a connector, and the lower part of the locking rod is fastened with a roller through a pin shaft and a locking nut; a track is fixedly arranged on the lower stander and below the roller. The locking device is used for locking the split stander of the steel pipe rolling machine and has the advantages of simplicity in structure, small occupied space, convenience in use and reliability in working performance.