The utility model discloses a movable connecting rod on mechanical equipment, including last connecting piece, king -rod and lower connecting piece, the end of going up the connecting piece is equipped with the king -rod, the king -rod other end is connected with lower connecting piece, the connecting piece passes through king -rod and the connection of last connecting piece down, upward be equipped with the gasket on the connecting piece, upward fix on the gasket and seted up the gasket hole, it is equipped with the connecting piece to go up the fixed welding in gasket center, the welding isequipped with the connecting rod screw thread on the connecting piece, the king -rod passes through the connecting rod screw thread and is connected with last connecting piece, be equipped with down the gasket down on the connecting piece, fix on the gasket down and offered the underlay film perforation, the fixed welding in gasket center is equipped with down the connecting block down, the connecting block was connected with the king -rod under the underlay piece passed through, and the device sets up the connecting piece and is connected the use with lower connecting piece with the king -rod, can carry out autonomic dismantlement to mechanical equipment's connecting rod and change, simple structure, easy realization.