The invention discloses an automobile brake friction plate wear resistance detection device, and relates to the technical field of automobile braking. The problem that existing detection equipment isnot high in efficiency is solved. The device specifically comprises a bottom plate, a transposition assembly and an external grinding assembly are fixedly connected to the outer wall of the top of thebottom plate, and a placing assembly is arranged in the transposition assembly. The placing assembly is arranged, a cage box is octagonal, a fixing plate and a top seat are both fixedly connected tothe outer wall of the cage box, and the placing assembly can meet the requirement for installation of eight friction plates at a time; secondly, the placing assembly is arranged in the transposition assembly, so that when the cage box rotates, the two functions of friction and detection can be met, and meanwhile, the fixing plate at the horizontal position can conduct material taking and loading work, and the detection efficiency is improved; and finally, according to abrasion resistance detection of a brake friction plate, external grinding is conducted in a friction plate fixing mode, and ashutdown procedure in the friction plate mounting process can be avoided.