The present invention relates to a rotating torque transmission buffered shaft, mainly including a casing tube, a shaft tube and a lock mounting member. The casing tube is formed with a receiving space and the inner walls of both ends of the casing tube are formed with a first inner screw thread and a second inner screw thread respectively. The shaft tube is installed within the receiving space and the middle section of the shaft tube is formed with a screw thread portion corresponding to the first inner screw thread. The lock mounting member is engaged and locked on the second inner screw thread. The rotating torque transmission buffered shaft described in the present invention is mainly applied to ships, speed boats, vehicles of large-sized transportation systems; can absorb and balance intense rotating torque generated instantly; and can reduce the torque difference due to the linkage between the engine and the transmission generated during operation.
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