The invention discloses a rail trolley system with a limiting device. The rail trolley system comprises a rail, a rail trolley and a parking platform, wherein the rail trolley can move along the rail; the parking platform is positioned on the side of the rail; a gravity hammer limiting device is arranged on the side, facing the parking platform, of the rail trolley; a check block is arranged on the side, facing the rail, of the parking platform; the gravity hammer limiting device comprises a hammer plate; the hammer plate is mounted on the side of the rail trolley through a middle movable shaft, and can naturally droop to be vertical; a stop lever is mounted at the lower end of the hammer plate; when the hammer plate is vertical, the upper end of the hammer plate is above the table surface of the rail trolley; a bevel is arranged on the end face, facing the moving direction of the rail trolley, of the check block; when the rail trolley enters the parking platform, the stop lever can be clamped on the check block along the bevel, and the hammer plate is turned over; and when the hammer plate is turned over, the hammer plate is lower than the table surface of the rail trolley. In the rail trolley system, the gravity hammer limiting device on the rail trolley does not need manual operation, and automatic limiting and contact limiting can be achieved.