The invention belongs to the technical field of ferrous metallurgy and particularly relates to a production method for preventing the cracking of mid-carbon high manganese steel. The method solves the technical problem of preventing the cracking of mid-carbon high manganese steel square billet during the continuous casting process production. The method for preparing the mid-carbon high manganese steel square billet comprises the following steps: rotary furnace smelting, LF+RH refining and square billet continuous casting; the method is characterized in that: during the continuous casting, the continuous casting pulling rate is controlled to be between 0.3 and 0.7m/min, and the cooling intensity is between 0.37 and 0.53L/kg; and simultaneously, at the RH refining station, after the Al content of steel is controlled to be between 0.010 and 0.050 percent, the ferrotitanium is added, and the Ti content of steel is controlled to be between 0.015 and 0.045 percent. By the improvement, the cracking of the mid-carbon high manganese steel big square billet which is strong in crack sensitivity is eliminated.