The invention discloses a gantry-type double turntable numerical control milling machine, the structure of which comprises a machine base, an X-axis guide rail, a transmission plate, a protective plate, a controller, a double turntable device, a gantry frame, a main shaft protective cover, a Y-axis guide rail, a main shaft, a control Line, turntable controller, clamping turntable, direction changing turntable, main engine, the double turntable device is a hexagonal structure and has more than two protective plates on the side, the top and rear end of the double turntable device are connected with the bottom of the gantry frame, and the gantry is U-shaped structure with a controller installed on the right side and electrically connected. The beneficial effects of the present invention are: the double turntable device provided by the utility model can place multiple processed products at the same time through a plurality of clamping turntables, and then switch the clamping turntables through the control of the host computer to change the direction of the turntable, realizing the double turntable with multiple workpieces The integrated processing greatly improves work efficiency and avoids wasting time.