The invention relates to a displacement meter supporting device capable of splicing multi-angle tests, which comprises a displacement meter and a tray, wherein an plugin is arranged at the front end of the tray, an installation seat, a connecting block and a clamp are fixedly arranged at the rear end of the tray, the installation seat is firmly connected with the connecting block, the connecting block is firmly abutted with the clamp, and the clamp is firmly clamped with the steel pipe; the displacement meter supporting device rotates along the Z direction to realize the multi-angle test in the Z direction when the clamp is loosened; the displacement meter supporting device can rotate along the X direction to realize the multi-angle test in the X direction when the connecting block is rotated; the displacement meter supporting device can rotate along the Y direction to realize the multi-angle test of the Y direction when the bolts of the mounting seat and the connecting block are loosened. The displacement meter supporting device can realize the test at various lengths and in various angles and directions, which has wide application range, simple structure, strong universal applicability and low cost, and meets the test requirements of the displacement meter in different directions.