To obtain the test data from the experimental research on the compliance factors of the flexure support structure of a large scale reflector used in an airborne image sensor, a compact single-axis flexure hinge experimental setup was proposed and designed. By using this experimental setup, end-bending and pure moment bending experiments of the single-axis flexure hinge could be achieved on a common single-axis Material Testing System(MTS) . This setup utilizes the leverage principle to realize the pure moment loading on the single-axis MTS and takes the side constraint configuration which is composed of several sets of rigid rollers to constrain the pure moment loading sub-assembly.By these ways, the effect of the friction on the load transmission was reduced greatly.Furthermore, the virtual simulation of the pure moment bending process was performed. It indicates that the side force stemmed from the constraint of “L” pushing component is the main influence factor on the bending processing, and the maximum side force can be controlled at 4.783 N. In order to verify the test data, Finite Element Analysis(FEA) and theoretical calculation were employed. The comparison shows that the test results are concident with FEA results and theoretical results well, and test results and theoretical results are slightly smaller than FEA results. Compared with FEA, the maximum relative error of the test data is only 3.87%, which indicates that this experimental setup is a good solution for study of flexure support structures used in optical reflectors.