Truss sectional beam welding mould

The utility model discloses a truss sectional beam welding mould. A first supporting seat and a second supporting seat in a pressing device of the mould form a clamping groove allowing a pipe profile to be clamped on the supporting face of a machine frame, a turning element is hinged to the first supporting seat, a locking structure is disposed on the second supporting seat, and a pressing bolt is rotatably arranged on the first supporting seat and/or the second supporting seat and/or a turning plate in a penetrating mode. When the mould is used, positioning is achieved by pressing the outer periphery of the pipe profile. Compared with the prior art in which the two ends of the pipe profile are positioned, the pipe profile can be positioned from the middle due to the pressing device, the situation that middle flexible deformation of the pipe profile in the welding process is avoided, in the machining process that the pipe profile and a diagonal bracing are welded to form a truss sectional beam, the pipe profile can be positioned more conveniently and accurately, and therefore the problem that in the prior art, time and labor are wasted in the positioning process of the pipe profile is solved.