The invention provides a rapid oil tube connecting device which comprises an upper joint tube, a lower joint tube and a lock column. An upper clamping boss is arranged on the upper joint tube, a lowerclamping boss is arranged at the lower joint tube, the lower portion of the upper joint tube can be rotationally inserted into the upper portion of the lower joint tube, the upper joint tube rotatesrelative to the lower joint tube, and the upper clamping boss and the lower clamping boss are clamped; a lock column is provided with a sliding pin, a containing groove is formed in the lower joint tube, a sliding way is arranged inside the containing groove, the sliding way is provided with a first limiting portion and a second limiting portion which are communicated, the lock column can movablypenetrate through the containing groove, the end of the sliding pin is inserted into the sliding way and can slide along the sliding way, the upper joint tube is provided with a clamping groove, the other end of the lock column can be inserted into the clamping groove, when the other end of the lock column is inserted into the clamping groove, the sliding pin is inserted into the first limiting portion, and when the other end of the lock column moves out of the clamping groove, the sliding pin is inserted into the second limiting portion. The existing oil tube sealing connection operation prices is simplified, and the purpose that testing operation saves labor and time is achieved.