The invention relates to a buffer aligning joint in the field of oil gas exploration and development tools. The buffer aligning joint comprises an upper ball joint, an upper ball seat, an upper end cover, an outer cylinder, a ball pin, a jet pipe, an internal spline, an external spline, a lower ball seat, a lower end cover, a lower ball joint, a lower ball seat and the like. A ball head of the upper ball joint and a ball head of the lower ball joint are installed in a spherical cavity which is defined by the upper ball seat, the lower ball seat, the internal spline and the external spline. The external spline is inserted into a spline groove of the internal spline. A slurry circulating channel is formed by a central hole of the upper ball joint, a central hole of the jet pipe, a central hole of the external spline and a central hole of the lower ball joint. An upper gas chamber is formed by the upper end cover, an upper ball seat and the outer cylinder. A lower gas chamber is formed by the internal spline, the external spline, the outer cylinder and the lower ball seat. When the buffer aligning joint is used for well drilling, the torque can be transferred to a drilling tool, the axial force can be borne, the circulating channel is provided for slurry, the axial impact force is buffered, a top drive is protected, large misalignment which probably happens to a power output shaft of the top drive relative to the axis of a wellhead is compensated, construction is convenient, and the construction efficiency is improved.