The invention discloses a trailer device with high stability. The trailer device with high stability comprises a trailer device body with a frame (1), a swing arm (6) connected with a walking wheel, a swing device I (5) connected with the swing arm (6), and a torsion eliminating device arranged between the swing device I (5) and the frame (1) and having the same structure with the swing device I (5) or a torsion eliminating connecting rod device consisting of a part having the same structure with the swing device I (5); the vibration impact force generated by the walking wheel is absorbed through an elastic rod (53) between a mandrel (52) and a shaft tube (51) of the swing device I (5) to prevent generation of the vibration impact force to the frame (1); and meanwhile, because of shaking of the frame (1) caused by wind resistance in the driving process, the generated shaking force of the frame (1) is absorbed through a mandrel (52) and a shaft tube (51) of the torsion eliminating device or the torsion eliminating connecting rod device, and the frame is not directly used any more, so that the vibration reducing effect of the trailer device and the driving stability of the trailer device are improved.