The invention discloses a dangerous goods transport vehicle carriage with high safety performance, which comprises a transport vehicle body, a carriage body, a connecting block, a protective layer androllers, and is characterized in that the carriage body is fixed on the upper surface of the transport vehicle body, a third spring is fixed on the rear side of the connecting block, a rotating shaftis arranged on the front surface of the connecting block, a connecting rod is installed on the surface of the rotating shaft, a fixing block is arranged on the surface of the rotating shaft, a secondspring is fixed to the lower surface of the fixing block, a bearing plate is fixed to the upper end of the fixing block, and a sliding frame is fixed to the surface of the right side in the carriagebody. According to the dangerous goods transport vehicle carriage with the high safety performance, the protective layer is arranged, the rising speed of the temperature in the carriage body due to the fact that the sun irradiates the carriage body can be decreased, meanwhile, by increasing the flow speed of air, heat in the carriage can be rapidly transferred out through the outer wall of the carriage body, and the safety of dangerous goods is further protected.