The invention discloses an automatic quenching machine tool. The automatic quenching machine tool comprises a feed mechanism and a workbench, wherein the workbench is arranged on one side of the feedmechanism, the feed mechanism comprises side plates, a first rotary rod is arranged between the side plates, a rotary roller sleeves the outer side of the first rotary rod, a conveying belt sleeves the outer side of the rotary roller, a limiting groove is formed in the conveying belt, a plurality of limiting strips are circularly fixed to the interior of the limiting groove, a bearing plate is arranged on one side of the limiting strips, a placing groove is formed in the bearing plate, an induction heating power supply is arranged on the top of the workbench, a guide plate is arranged on one side surface of the workbench, and a plate outlet groove is formed in the workbench. According to the automatic quenching machine tool, the feed mechanism and a grab mechanism are arranged, so that continuous feeding, overturning and taking are completed by virtue of the feed mechanism and the grab mechanism; compared with manual operation, the automatic quenching machine tool has the advantages that to-be-quenched workpieces can be continuously processed, the equipment downtime is reduced during processing, manpower is saved, and the machining efficiency is effectively improved.