Abstract: The present invention discloses a ball-type traction assembly, comprising a ball socket allowing a traction ball to be installed in a position on a surface thereof; a hole is provided at a surface position of one side of the ball socket, wherein a position of the traction ball is limited through an installation mechanism, and by arranging a limiting mechanism, the traction ball may be guaranteed to be inserted into an interior of the ball socket to prevent the traction ball from rotating. The ball-type traction assembly is provided with the ball socket, the ball socket can be selectively arranged upward or downward, that is, a position of the traction ball relative to the ball socket can be reversed, such that a method of milling flat two side faces of a contact position between the traction ball and the ball socket can meet needs with no need of additional machining.