The invention discloses a tank car rollover early warning system and method based on slip rate and yaw force, and belongs to the technical field of vehicle safety. The early warning system includes awheel speed sensor, a yaw angular speed sensor, a data storage module, a data processing module and an alarm device. Tank car rollover early warning system and method based on slip rate and yaw forceprovides a rollover early warning system and method for dangerous goods transport tanker based on inner wheel slip rate and tank sway force without affecting the normal driving of the driver; the rollover threshold range summarized by rollover test is input into data processing module; through the real-time data acquisition and calculation evaluation, the dangerous state of the tank car rollover can be effectively predicted in advance, whose advance and the accuracy are better. The wheel speed sensor, the yaw rate sensor and the vehicle-mounted data processing module have the advantages that they are small in size, low in cost, easy to install and convenient to popularize in dangerous goods transportation vehicles.