The invention provides a bending test device and a bending test method for a flexible display panel. According to the device, air holes are evacuated, so that the flexible display panel is adsorbed and fixed, a control motor controls a clamping plate to reciprocate, so that the flexible display panel forms different bending diameters, bending test of the flexible display panel is finished, the flexible display panel cannot be clamped by the aid of clamping heads, so that the problem of laying of materials of different layers caused by surface tension without being released due to clamping of the clamping heads is avoided when materials of the flexible display panel is bent, bending characteristics of the flexible display panel are really reflected, and bending test accuracy is effectively improved.