Lathe cutting machining clamp

The utility model discloses a lathe cutting machining clamp. The lathe cutting machining clamp comprises a clamp seat (10), a shaft casing (5), a first bearing (4), a second bearing (6), a hollow rotary shaft (7), a flange plate (2) and a self-centering chuck (1), wherein the bottom of the clamp seat (10) is matched with a guide rail of a lathe body, the shaft casing (5) is fixedly connected with the clamp seat (10), outer circles of the first bearing (4) and the second bearing (6) are arranged at two end portions of the shaft casing (5) in a matched mode, the hollow rotary shaft (7) is arranged in the inner circles of the first bearing (4) and the second bearing (6) in a matched mode, the flange plate (2) is fixedly connected with one end of the hollow rotary shaft (7), the self-centering chuck (1) is connected with the flange plate (2) in a detachable mode, and after the clamp seat (10) is arranged on the guide rail of the lathe body in a matched mode, the self-centering chuck (1) has the same axis with the