This utility model relates to a dual-
turret vertical turning composite
machine tool. It solves the technical problems of insufficient support for the workpiece in existing spindle systems. It includes a
machine tool base and a
machine tool column vertically mounted on the upper part of the
machine tool base. Two power turrets are movably mounted on one side of the
machine tool column, and a
turret movement drive mechanism is provided between the power turrets and the
machine tool column. The power turrets have at least one of turning, milling, and drilling / milling components. An electric spindle is located on the upper part of the machine tool base, with a chuck
assembly for clamping the workpiece at its upper end and a
brake assembly. A spindle-type center
assembly is located on one side of the machine tool column via a
tailstock vertical lifting structure. The advantages are: the design of the electric spindle and chuck assembly, the pull-back chuck connected to the rotary cylinder via a pull rod, provides uniform and stable clamping force, enabling high-speed
cutting and precision
machining; and the spindle-type center assembly, with its height adjustable via the
tailstock vertical lifting structure, forms end support with the chuck assembly.