Based on the characteristics of railway vehicles,the crashworthy subway vehicle was designed.The design concept of crashworthy car-body was proposed and the energy-absorbing process of the head car impact was divided into four steps: the first step is the rubber buffer of the buffer equipment of vehicle coupler;the second is the buffer with collapsible tube;the third is the cut bolt of vehicle coupler;the fourth is the special energy-absorbing structures and the anti-climbers on the underframe of head car.B...