Gantry frame measuring device

The utility model discloses a gantry frame measuring device, and belongs to the technical field of mechanical manufacturing process. Comprising a linear meter rod, an inner caliper measuring device and an outer caliper measuring device, the inner caliper measuring device is fixed on the upper side wall of the linear meter rod, and the outer caliper measuring device is fixed on the lower side wall of the linear meter rod; the inner caliper measuring device and the outer caliper measuring device are respectively composed of a positioning gauge stand, a measuring gauge stand, a supporting column, a dial indicator and a knurled flat head screw, the positioning gauge stand and the measuring gauge stand are respectively a right-angle bent plate body with an L-shaped cross section, transverse plates of the positioning gauge stand and the measuring gauge stand are respectively fixed on a linear gauge rod through screws, the supporting columns are respectively arranged on the transverse plates, the supporting columns