The invention discloses an automobile collision bumper, and relates to the technical field of automobiles. The automobile collision bumper comprises a hydraulic buffer mechanism fixed to the front end and/or the rear end of an automobile chassis, wherein the hydraulic buffer mechanism comprises at least three crush buffer units which are connected in series in an end-to-end mode, each crush buffer unit comprises a sleeve, each sleeve is provided with a crush rod with a pointed end in a sliding seal mode, a blocking sheet is fixed to the outer side of the pointed end of each crush rod in a sealing mode and is arranged on the inner wall of the corresponding sleeve, a liquid chamber filled with liquid is arranged between each blocking sheet and the corresponding crush rod and is arranged in the corresponding sleeve, and a drainage hole is formed in the portion, on the outer side of the corresponding liquid chamber, of each sleeve. The automobile collision bumper has the advantages that when the automobile collision bumper is installed on an automobile, due to the facts that the multiple levels of crush buffer units which are connected end to end are used, the blocking sheets are crushed step by step, and liquid is ejected out at a high speed, kinetic energy in the collision process of the automobile is converted, the collision time of the automobile can be prolonged, impact force is reduced, kinetic energy generated in the collision process can be absorbed, and the purpose that a human body and an automobile body are protected against damage at the same time is achieved.