Adjustable three-point bending measurement jig base fulcrum

The utility model belongs to the technical field of measuring jigs, and particularly relates to an adjustable three-point bending measuring jig base fulcrum which comprises a base, a through groove is formed in the center of the base, sliding grooves are symmetrically formed in the left side and the right side of the through groove, and a limiting step is integrally formed and connected to the center of the top of the base. The adjusting component comprises a movable support slidably connected to the base, a sliding seat in sliding fit with the sliding groove is integrally connected to the bottom of the movable support, a positioning seat is connected to the front end of the movable support, a limiting groove matched with the limiting step is formed in the bottom of the positioning seat, a micrometer head is connected to the fixed side plate, and a micrometer head ejector rod extends to the inner side of the fixed side plate. When the micrometer head moves, the movable supports are driven to move horizontally