The invention discloses a four-branch-chain three-platform one-rotor high-speed parallel connection mechanical hand, which comprises a fixing frame, a movable platform and four moving branch chains, wherein the four moving branch chains are arranged between the fixing frame and the movable platform, are in central symmetry arrangement and have the same structures, the movable platform comprises an upper platform, a lower platform, a tail end executer, four swinging rods, a spiral shaft and two support rods, the four swinging rods are arranged around the movable platform in a radial shape, and the two adjacent swinging rods are in rotational connection or hooke hinging or ball hinging to a connecting element, so the adjacent swinging rods realize the movement in opposite directions, one end of a spiral rod is rotationally connected with the upper platform, the middle of the spiral rod is spirally connected with the lower platform, the other end of the spiral rod is fixedly connected with the tail end executer, under the driving effect of a driving device, the lower platform moves in the spiral shaft direction, and the tail end executer fixedly connected with the spiral shaft realizes the rotation around the self axial line through screw thread connection effects. The four-branch-chain three-platform one-rotor high-speed parallel connection mechanical hand has the advantages that the force transmission effect of the movable platform is good, the movement of the mechanism is smooth, and the service life is long.