The invention discloses an agricultural machine vibration reduction connecting mechanism. The invention discloses an agricultural machine vibration reduction connecting mechanism, and relates to the technical field of mechanical vibration reduction connecting mechanisms, the agricultural machine vibration reduction connecting mechanism comprises a base plate, two stand columns and two vertical plates are fixedly installed on the top side of the base plate, and the sides, close to each other, of the two stand columns are fixedly provided with the same center rod at the top end; and the positions, close to the two ends, of the center rod are each sleeved with two movable connecting rods, and the two movable connecting rods located on the same side are arranged in a crossed structure. The agricultural machine vibration reduction connecting mechanism is reasonable in structure and easy to operate, the mechanism is fixed through the base plate, a corresponding seat is installed and fixed through a mounting plate, the two movable connecting rods located on one side are both arranged in a crossed structure, and the top ends and the bottom ends of the two movable connecting rods synchronously move on a linear guide rail through a sliding blocks and get away from or get close to each other, so that the height between the mounting plate and the base plate is changed when vertical force is exerted on the mounting plate and the base plate, and the further vibration reduction effect is achieved through tension of tension springs.