Arc part clamping tool for linear cutting

The utility model discloses an arc part clamping tool for linear cutting, and relates to an arc part clamping tool. The utility model aims to solve the problems of high processing cost, low processingefficiency, inaccurate and inconsistent benchmark and larger processing error of radial angles of R-shaped lines of a radial radiating surface in the arc section processing process of the existing arc-shaped parts. An arc part clamping tool for linear cutting is composed of a lower bottom plate, an insulating plate, an upper bottom plate, a positioning seat body, a first positioning plate, a second positioning plate, a cushion block and a pressing plate. Wherein an insulating plate is arranged on the lower bottom plate, an upper bottom plate is arranged on the insulating plate, a positioningseat body is arranged on the upper bottom plate, a pressing plate is arranged on one side of the positioning seat body, and a first positioning plate is arranged on the other side of the positioning seat body; and a cushion bl