The invention belongs to the technical field of automobile components, and provides an automobile headrest supporting rod assembling device. The automobile headrest supporting rod assembling device comprises a worktable, a workpiece placement mechanism, a supporting rod pushing mechanism and a clamping buckle pushing mechanism; the workpiece placement mechanism is arranged at the upper end of theworktable and is used for fixing a workpiece; the supporting rod pushing mechanism is positioned on one side of the workpiece placement mechanism, is fixedly connected with the worktable and is used for clamping a supporting rod and drives the supporting rod to perform curvature movement; and the clamping buckle pushing mechanism is positioned on one side of the workpiece placement mechanism and is connected with the worktable. Compared with the prior art, the automobile headrest supporting rod assembling device has the advantages that the automobile headrest supporting rod assembling device can be adapted to headrest supporting rods with different lengths and different bending angles; the universality of equipment is improved; the production cost is reduced; manual operation steps are reduced; the production efficiency is improved; and moreover, a headrest supporting rod can be completely assembled in an automobile headrest, and the product yield is improved.