The invention relates to the technical field of exhaust pipe processing and discloses a mold for processing of an exhaust pipe. The mold comprises a supporting table and a pressure mechanism, whereina limiting groove is formed in the supporting table; two molding blocks are rotationally connected into the limiting groove; the pressure mechanism comprises a supporting frame; a molding rod is connected with the supporting frame; a pushing rod is slidably connected with the upper end of the supporting frame; a circular ring body is arranged at the lower end of the pushing rod; a conveying assembly is arranged on one side of the supporting table; an adjusting assembly is arranged at the upper end of the conveying assembly and comprises supporting plates distributed on two sides of the conveying assembly; a lower baffle plate is slidably connected between the supporting plates; a partition plate extending downward is arranged on the lower baffle plate; limiting pipes are arranged on two sides of the partition plate; control rods are slidably connected into the limiting pipes; second elastic parts are connected between the control rods and the partition plate; clamping grooves are formed in the supporting plates; a plate material is subjected to compression molding through the pressure mechanism; and the molded exhaust pipe on the conveying assembly is subjected to deviation rectification through the adjusting assembly. The mold provided by the invention has the advantage that the central axis of the exhaust pipe and the conveying direction can be kept perpendicular.