The invention discloses a passive force/moment feedback driver of a man-machine interface device for controlling a remote-control operation robot, comprising a shell, a moment feedback shaft, dynamical friction pieces, magneto-rheological fluid and an electric signal input coil, wherein the moment feedback shaft, the dynamical friction pieces and the magneto-rheological fluid are arranged into theshell, the electric signal input coil is used for inputting an electric signal converted by a long-distance force signal, the dynamical friction pieces are fixed on the moment feedback shaft, at least one static friction piece is arranged in the shell, the static friction pieces are arranged among the dynamical friction pieces at intervals, the magneto-rheological fluid is filled around the dynamical friction pieces and the static friction pieces, and the electric signal input coil is coiled outside the static friction pieces. The passive force/moment feedback driver adopts a magneto-rheological fluid technology and converts the magneto-rheological fluid into the electric signal to be input into the electric signal input coil, a passive feedback moment is generated on the moment feedbackshaft under the action of a coil magnetic field to the magneto-rheological fluid, and feedback force is continuous and stable. The passive force/moment feedback driver has simple and compact structure, light weight, small size and friction force and stable and safe characteristics and can transfer a larger moment.