Adjustable center frame of cam lathe

The utility model discloses an adjustable center frame of a cam lathe, which comprises a near end supporting frame (1), a longitudinal support (2), a near end center support body (3), a center frame support (4) and a center frame support gasket (5). The adjustable center frame is characterized in that a bearing roller (8) is fixed at the inner end of the center frame support (4), an upper press plate (10) and an upper press plate (10') are respectively connected onto bottom boards of the near end supporting frame (1) and a far end supporting frame (1') by a screw (9) and a screw (9'), and a middle pressing center support body (11) and a middle pressing center support body (11') are arranged in the middle of the longitudinal support (2). As the adjustable center frame of a cam lathe can apply multi-point compression to a camshaft piece by the bearing roller during processing of a camshaft, when the camshaft piece is processed, spindle bounce of the camshaft piece is extremely small, surface quality of the proc