Spline shaft capable of being quickly disassembled, assembled and connected

The utility model discloses a spline shaft capable of fast disassembly and connection, which comprises a spline shaft body, a connecting column and a spline shaft sleeve, the end part of the spline shaft body is fixedly welded with the connecting column, the periphery of the connecting column is fixedly welded with a connecting clamping plate, and the connecting clamping plate is in sliding connection with a locking groove constructed on the side wall of a connecting flange plate. A threaded groove communicated with the locking groove is formed in the side wall of the connecting flange plate, a fixing stud is in threaded connection with the interior of the threaded groove, the end of the fixing stud abuts against the connecting clamping plate, the periphery of the spline shaft body is sleeved with a spline shaft sleeve, a plurality of spline grooves are formed in the periphery of the spline shaft body, and the spline shaft sleeve is sleeved with the spline shaft sleeve. A transmission shaft body is fixedly we