The invention discloses an injection molding type joint ball pin and a preparation method thereof, and relates to the field of bearings, the injection molding type joint ball pin comprises a ball pin head and a ball pin seat, the ball pin head is fixedly provided with a spherical part, the spherical part is located in the ball pin seat, the ball pin seat comprises a pressing sleeve and a bearing shell, the bearing shell covers the outer side of the spherical part, and the pressing sleeve is located on the outer side of the bearing shell. A built-in cavity is formed in the inner side of the pressing sleeve, the maximum inner
diameter of the built-in cavity is larger than the maximum outer
diameter of the bearing shell, the side, away from the spherical part, of the bearing shell is located in the built-in cavity, so that the built-in cavity forms a
closed space, a wear-resisting elastic
gasket is arranged in the
closed space, and an injection molding hole communicated with the built-in cavity is formed in the pressing sleeve. The wear-resistant elastic
gasket is integrally formed in the
closed space through the injection molding hole in an injection molding mode, a first oil hole communicated with the outside is formed in the wear-resistant elastic
gasket, and a second oil hole communicated with the first oil hole is formed in the bearing shell. The wear-resistant elastic gasket has the effect of meeting the
lubrication requirement of the wear-resistant elastic gasket while reducing the channeling probability of the wear-resistant elastic gasket.