The invention relates to the technical field of intelligent security technologies, and discloses an intelligent security door opening and closing device based on an
electrorheological fluid. The device comprises a door frame and a shell, wherein a door plate is movably connected to the outside of the door frame, a
nitrogen spring is movably connected to the outside of the door plate, a sliding rodis movably connected to the outside of the door plate, and a rotating wheel is fixedly connected to the outside of the door plate; under the interaction of the door frame, the door plate, the
nitrogen spring, the sliding rod, the rotating wheel, a fixed shaft, the
electrorheological fluid, a spring and a clamping rod, the door plate can be automatically closed under the automatic reset effect ofthe
nitrogen spring after being opened, and therefore the door plate is more suitable for the use
habit of daily personnel; and when the door plate needs to be thoroughly opened so that large objectscan enter and exit, the door plate can be temporarily fixed through the characteristic of the
electrorheological fluid, closing of the door plate is avoided, opening and closing of the door plate areadjustable, and the device is more suitable for being used under actual conditions.