The utility model provides a radio frequency wrist strap has solved that warping easily appears in data switch section among the prior art, causes the problem that the non -contact card damaged, including the wearing body that is used for the person of wearing to dress, including the fixed body and the first area body and the second area body, fixed body both ends are provided with first draw -in groove and second draw -in groove respectively, locking device sets up on the body of first area, a plurality of locking holes set up on the body of second area, flexible communication device sets up on the fixed body, including flexible communication module and controlling means, controlling means and flexible communication module are connected, the first card body and the second card body set up respectively at flexible communication device both ends, and place first draw -in groove and second draw -in groove in, the utility model provides a flexible communication device of radio frequency wrist strap can adapt to hard thing and deformation, avoids it to appear damaging.