Separation type intramedullary nail device

The present invention relates to a separation type intramedullary nail device, including a first joining element, a second joining element joined with the first joining element, wherein the first joining element is a hollow shape having a first connecting end that has external thread and a stopping part in its interior, used for a connection bolt formed in hollow bolt shape to insert in. The head portion of the connection bolt is stopped by the stopping part. The second joining element is a long hollow rod of which the neck part on one end is provided for the first joining element to install. The other end of the second joining element is the second connecting end that has external thread, used for the second joining element to be rotated so as to screw enter the medullary cavity to join one side of the broken bone. The neck part of the second joining element is internally threaded; the connection bolt inserts into the first joining element and screwed on the internal threads so as to drive the first joining