The invention relates to a consumption type turning fixture for a vertical type lathe, particularly to an adjustable tire for positioning turning workpieces. The consumption type turning fixture for the vertical type lathe is mainly used for solving the problems that under the condition that a product spigot is set, spigot positioning on a matched lathe can only be performed one time on a general consumption type turning fixture for a vertical type lathe and further utilization rate of the fixture is low and that under the condition of relatively large back engagement of cutting edge, workpieces are prone to rotate circumferentially. The consumption type turning fixture for the vertical type lathe is characterized in that four consumption blocks are arranged on a turning fixture base symmetrically and are connected onto the base through bolts for radial elongated holes. According to the consumption type turning fixture for the vertical type lathe, the consumption blocks can be adjusted in the radial direction so that the turning fixture utilization rate is improved, the friction factor of a press-fitting contact surface of the turning fixture and the workpieces can be increased through a right-angle slot structure of the press-fitting contact surface of the turning fixture and the workpieces, shortcoming of rotation inclination of the workpieces in the circumferential direction in a turning process can be overcome, and therefore, product quality can be improved.