The invention discloses a driver interaction system using inertia to measure. The driver interaction system using the inertia to measure comprises a car speed detecting system and further comprises a processor connected with the car speed detecting system. The processor is further connected with a back portion range measuring module arranged at the car tail, an IMU module arranged on a car and a tactile sense interaction module arranged in the car. According to the scheme, through a distance sensor arranged at the car tail, when a driver brakes hard, the IMU module detects changes of car acceleration, according to the running speed and acceleration of the car and distance from a back car, the processor sends a control signal to the tactile sense interaction module, and the tactile sense interaction module prompts the driver according to the control signal sent by the processor. The driver interaction system using the inertia to measure has the advantages that the driver is timely prompted, rear-end collision of the back car caused by unnecessary hard braking is avoided, meanwhile, the safe distance of the back car and the front car is ensured, and the reliability is higher.