Portable data transmission device

The invention belongs to the field of computer hardware, and particularly relates to a portable data transmission device which comprises a portable storage device, the right side of an inner cavity of the portable storage device is movably connected with a control bolt rod, and the right end of the control bolt rod extends to the outside of the portable storage device. The right end of the control bolt rod is fixedly connected with a rotating retaining ring, the portable storage device comprises a capsule shell, and the middle of the inner wall of the capsule shell is fixedly connected with parallel partition plates. Compared with a key structure, a safety system of the device does not need a lock cylinder structure, so that the production cost is greatly reduced, the product structure is lighter and more suitable for carrying and transferring, other people cannot push out the clamping head from an independent portable storage device without using the traction effect of a control bolt rod, and the safety of t