The invention provides a telescopic automobile suspension ball head. The telescopic automobile suspension ball head comprises an upper cover, a ball sleeve, a ball wrist, a ball seat, a dustproof cover and a ball pin. The ball pin is installed inside the ball seat through the ball wrist and the ball sleeve. The dustproof cover is installed at the bottom of the ball seat in a sleeving mode. The upper cover is fixed to the top of the ball seat. An oil nozzle is formed in the upper cover. A first nut is installed at the bottom of the ball pin through an open pin. The telescopic automobile suspension ball head further comprises a bottom cover assembly. The bottom cover assembly is arranged in the middle of the ball pin and wraps up the dustproof cover. According to the telescopic automobile suspension ball head provided by the invention, the situation that the dustproof cover is directly exposed to pollutants such as water, sand, salt, soil and the like is avoided due to the fact that thebottom cover assembly is added outside the dustproof cover, thus, the phenomenon that the characteristics of lubricating grease are changed because these pollutants permeate into the suspension ball head can be effectively prevented, and the service life of the suspension ball head is prolonged.