Mechanical high-temperature tensile fixture

The invention discloses a mechanical high-temperature tensile fixture, and relates to the technical field of material testing, the mechanical high-temperature tensile fixture comprises an upper tensile fixture assembly and a lower tensile fixture assembly, and two ends of a sample are respectively clamped by the upper tensile fixture assembly and the lower tensile fixture assembly; the upper stretching clamp assembly comprises an upper high-temperature pull rod, a pull arm seat, two pull rods, two extrusion rods, two extrusion parts, a puller body and two puller cores, the lower end of the upper high-temperature pull rod is connected with the pull arm seat, the two sides of the pull arm seat are hinged to the head ends of the pull rods respectively, the tail ends of the pull rods are hinged to the head ends of the extrusion rods, and the tail ends of the extrusion rods are hinged to the upper end of the puller body; a protruding extrusion part is arranged on one side of the tail end of each extrusion rod, an