The invention teaches a passive vehicle rear end warning and collision prevention method and apparatus thereof, comprising: a traveling data monitoring unit serving to monitor and sample the traveling data of present vehicle; a collision prevention information transmitting and receiving unit serving to transmit and receive the collision prevention information; an electronic control unit serving to analyze and process the sampled data so as to generate the collision prevention information and to receive the collision prevention information from other vehicle, and to control the traveling status of prevent vehicle based on the received collision prevention information so as to avoid rear end collision with other vehicle, so that the purpose of rear end warning and collision prevention is realized by receiving passively the collision prevention information from another vehicle.