Clamp for pipe machining

The utility model discloses a clamp for pipe machining. The clamp comprises a base, the main clamp is arranged on the base; wherein the main clamp comprises a fixing piece and a clamping mechanism, and the upper end of the fixing piece is provided with a first opening capable of partially containing a pipe; wherein the clamping mechanism comprises a driving piece and a clamping piece connected to the output end of the driving piece, a second opening capable of partially containing the pipe is formed in the end of the clamping piece, and the driving piece drives the clamping piece to move so that the pipe can be located between the first opening and the second opening. According to the utility model, the main clamp and the auxiliary clamp are arranged to limit the axial degree of freedom of the pipe, and then the free end of the pipe in the horizontal direction is limited through the side pressing clamp, so that the six free ends of the pipe in the space are all limited, the clamping effect of the clamp is sta