Steering tie rod ball joint

The utility model discloses a steering tie rod ball joint which comprises a shell and a ball pin. The shell comprises an outer shell, an inner shell and a granular buffer layer; the ball pin comprises a ball head and a pin rod; the outer shell is provided with a first cavity capable of containing the inner shell, the inner shell is arranged in the first cavity, the buffer layers are evenly distributed between the inner shell and the outer shell, and the inner shell is provided with a second cavity capable of containing the ball head. The shell is provided with an opening penetrating through the second cavity, and the ball head is arranged in the second cavity. According to the steering tie rod ball joint, lubricating oil sequentially penetrates into the ball head in the second cavity and the inner side wall of the inner shell through the oil injection hole, the first cavity and the oil seepage hole to be lubricated, and abrasion and vibration generated by corresponding rotation between the ball head and the i