The invention discloses an automobile collision energy dissipation protection device, and belongs to the field of automobile protection devices. In order to solve the problem that the energy absorption effect is not ideal because a pure shearing mode is adopted in energy dissipation of the conventional safety protector, the protection device disclosed by the invention comprises a front template and a rear template, wherein at least one box-type energy absorption device capable of shearing crushing energy dissipation is arranged between the front template and the rear template. The conventional pure shearing energy dissipation in the prior art is changed into crushing deformation energy dissipation of a thin-wall box-type structure, so that a running automobile can immediately realize automatic shutdown after collision, comprehensive automatic vibration absorption can be simultaneously performed, the impact force of the automobile can be relieved or eliminated, the energy dissipation effect is remarkably improved, comprehensive protection of safety of the automobile and the personnel is realized, and the safety of the automobile and the personnel can be effectively protected at rear collision.