The utility model discloses a multi-connecting-rod gripping device. The multi-connecting-rod gripping device comprises a fly wheel driven by a motor and a connecting rod I, a swing rod, a connecting rod II, a guide rod, a connecting rod III and a pull rod, wherein the connecting rod I, the swing rod, the connecting rod II, the guide rod, the connecting rod III and the pull rod are sequentially hinged. The swing rod is provided with three hinged points, the first hinged point is connected with one end of the connecting rod I, the second hinged point is connected with the connecting rod II, and the third hinged point is fixed; the other end of the connecting rod I is hinged to the edge of the fly wheel, the guide rod is matched with a sliding block, the connecting rod III is driven by the motor, and the motor is installed on the hinged point of the connecting rod III and the guide rod; one end of the pull rod is hinged to the connecting rod III, the other end of the pull rod is fixedly connected to a fixed plate of a gripping mechanism. The swing rod is a triangular support or a three-connecting-rod mechanism, and different moving distances of the gripping mechanism can be obtained by changing the positions of the hinged points of the swing rod; the fly wheel serves as a driving part and therefore enhances the bearing capacity of a system; the gripping mechanism is driven by an electric telescopic rod, a mechanical hand can be designed into different shapes according to gripped objects, and therefore the gripping requirement is met.