The invention relates to a metal-cutting machine tool for automatically machining a steel reinforcement connection sleeve, which comprises a machine frame, wherein a rotating table, a main spindle box and a hydraulic table are sequentially assembled at the upper part of the machine frame; and a hydraulic station and a cooling station are installed at the lower part of the machine frame. In the invention, independent processes of performing drilling, tapping and turning performed respectively by a corresponding independent machine in the traditional method are integrated into an automatic and continuous process, and the process from sleeve blank input to finished sleeve output is realized completely through automatic machining; therefore, work by multiple operators and multiple independent machines can be replaced, equipment, site and workers can be saved, work efficiency can be improved, and productive cost can be reduced; in the invention, the tubingless plate type integration oil cylinder technology is adopted, so that a large number of traditional externally-exposed oil tubes are saved, the structure is compact, the maintenance is convenient, an oil-way channel is short, and the oil current resistance and leakage are reduced; the metal-cutting machine provided by the invention is provided with a hydraulic control screw clutch and a rotary oil-cylinder friction plate clutch to realize rigid tapping, so that the axial force that a screw tap bears can be reduced, and the thread accuracy can be improved; in addition, a high-pressure gas and liquid atomizing cooling and chip-blowing technology is adopted.