The invention discloses an automatic casting machine, which comprises an upper platform, a support frame and a framework, wherein the support frame is arranged on the upper platform in a parallel way and is used for rotationally installing a rotating bracket; the framework is used for installing pulleys; the framework is arranged at the back side of the support frame; the framework comprises two upright posts in parallel arrangement in opposite directions; the pulleys comprise an upper pulley and a lower pulley; the upper pulley and the lower pulley are rotationally arranged on the surface of one opposite side to the two upright posts; the end part of one side, near the framework, of the rotating bracket is fixedly connected with a rope; the far end of the rope passes through the upper pulley and the lower pulley and is then pulled through being driven by a motor; the end part of one side, far away from the framework, of the rotating bracket is rotationally arranged on the support frame; a pouring ladle used for pouring out molten iron is arranged on the rotating bracket.