The invention relates to the technical field of automobile part performance test instruments, and provides a clamping device for multi-dimensional mechanical detection of an automobile steering pull rod, and the clamping device comprises a clamping piece, a connecting piece, a multi-dimensional feeding shaft, a base, a cooling cylinder and a top seat, the top seat is fixedly arranged at the top of the cooling cylinder, and the base is coaxially arranged at the outer side of the cooling cylinder; the connecting piece is radially, fixedly and coaxially assembled on the inner side of the lower portion of the cooling cylinder, the clamping piece is coaxially assembled in a cavity formed in the inner side of the top base, the inner side of the cooling cylinder and the inner side of the connecting piece, and the upper portion of the multi-dimensional feeding shaft is rotatably and coaxially assembled on the inner side of the portion, below the clamping piece, of the connecting piece. And when the multi-dimensional feeding shaft is rotated in the radial direction, the clamping piece and the connecting piece can synchronously and axially move, and when the multi-dimensional feeding shaft is rotated in the radial direction, the clamping piece can synchronously and radially rotate. According to the invention, high-precision clamping can be provided, periodic tests of tensile, compressive and torsional properties on the same part can be realized, and more accurate and comprehensive detection results can be provided.