The utility model belongs to a composite material preparation technology, and in particular relates to a composite material transmission shaft adopting bolt and carrying plate nut connection. A bolt and carrying plate self-locking nut connection method is mainly adopted to replace conventional methods for cementing, spline connection, fastening piece connection and the like; under a condition that a use condition is met, the connection method has the characteristics of convenience in assembling and disassembling, reliable connection, transmission of large torque and axial force, high fatigue resistance, light weight, low cost and the like, and a novel technical way is supplied to connection of a pipe body of the composite material transmission shaft and a metal joint.