The invention relates to a regenerated rubber production automatic rubber crushing machine. The regenerated rubber production automatic rubber crushing machine comprises a bottom plate, a conveying mechanism and a crushing mechanism, wherein the bottom plate is provided with the conveying mechanism, and the crushing mechanism is arranged inside the conveying mechanism; the middle of the bottom plate is provided with a square opening; the conveying mechanism comprises a first fixing frame, a first baffle, a second baffle, a second fixing frame, a connecting rack, a separating plate, a conveyingbelt, a support frame, a conveying gear, a conveying motor and a mounting frame; the crushing mechanism comprises a crushing roller, a crushing motor, a protective plate, a screen plate, a support plate, a rack, a driving gear and a driving motor. The regenerated rubber production automatic rubber crushing machine can solve the problems of incomplete crushing, poor working continuity, material accumulation and waste and the like during regenerated rubber production automatic rubber crushing processes, achieve a rubber automatically crushing function and have the advantages of being thorough in crushing, good in working continuity, less prone to material accumulation and waste and the like.