The invention discloses a hooking traction device for a round bale baler, which comprises a baler body, a drive vehicle body, a drive vehicle traction block, a baler traction block, a first steering block, a moving connection block, a buffer spring, a connecting rod, the first pin, the pin chute, the turning slot, the rotating chuck, the second turning block, the third turning block, the turning connecting block and the elastic slot, the second turning block is fixed at the tail of the driving car body, and the The second steering block is rotatably connected with the traction block of the driving vehicle. The round bale baler is connected to the traction device, and the impact force of the connection traction position is absorbed by the buffer spring to avoid excessive impact, so that the first pin and the second pin If damage occurs, the connection will be broken and danger will occur. At the same time, through the connection between the connecting rod and the moving connection block, and then through the connection between the connecting plate and the traction block of the driving vehicle, two-way connection is realized, which improves the connection stability of the traction device, and at the same time, the connection and installation are relatively simple. .