Disclosed is a miniature vertical lathe. The miniature vertical lathe comprises a case, a servo motor, a main shaft, a three-jaw chuck, an oil tank, a rotary cylinder, a stand column, a sliding table, an arrangement seat, a knife tower, a protecting device, a limiting switch, a control panel and a dust collector. The miniature vertical lathe is characterized in that the servo motor is disposed at the bottom in the case; the servo motor is connected with the main shaft through a transmission device; the hydraulic three-jaw chuck is disposed on the working face of the main shaft and connected with the oil tank and the rotary cylinder; the oil tank and the rotary cylinder are disposed inside the main shaft; the stand column is mounted right behind the main shaft and fixed to the back of the case of the lathe; the sliding table is disposed on the stand column and the knife tower is fixedly mounted through the arrangement seat by means of the sliding table. The miniature vertical lathe is simple in structure, small in size, high in accuracy and short in machining time and can quickly change cutters.