The invention provides a multiaxis tramcar safety control system based on suspension travel detection and belongs to the technical field of engineering machinery control. The multiaxis tramcar safety control system based on the suspension travel detection comprises a height sensor, a suspension oil cylinder controller, a suspension height adjuster, a tramcar controller and an alarm device, wherein the height sensor is arranged on the suspension, the suspension oil cylinder controller is connected with the height sensor and sets overtravel threshold value, the suspension height adjuster is connected with the suspension oil cylinder controller, the tramcar controller is connected with the suspension oil cylinder controller, and the alarm device is connected with the tramcar controller. The multiaxis tramcar safety control system based on the suspension travel detection can judge height of the suspension and identify current working conditions, power takeoff suspending and brake protection of the tramcar can be realized, and safety of the tramcar is improved.