Lathe clamping structure for machining two ends of part

The utility model discloses a lathe clamping structure for machining two ends of a part. Mounting plate, mounting screw holes are formed in the mounting plate; a positioning clamp is arranged on the mounting plate; a circular hole with an I-shaped section is formed in the center of the mounting plate; the positioning clamp comprises a positioning plate, the positioning support column is arranged on the positioning plate; a clamping and pressing plate is arranged on the positioning support column; a column rod with an I-shaped section is fixed on the bottom surface part of the positioning plate; a spring is fixed between a cross rod at the bottom of the column rod and the circular hole; a clamping strip-shaped groove is formed in the top face of the mounting plate, a transmission lead screwis arranged in the clamping strip-shaped groove, a rotating handle is fixed to the side portion of the mounting plate, a sliding block is arranged in the clamping strip-shaped groove, a linear clamping protruding block is fi