The invention provides a composite bulb artificial hip joint, and the artificial hip joint is formed by the combination of an artificial acetabulum and a composite bulb. The internal surface of the artificial acetabulum cooperates with the external surface of the composite bulb, and the composite bulb can rotate in the artificial acetabulum. The interior of the artificial acetabulum is not provided with a liner, and the internal surface of the artificial acetabulum makes direct contact with the composite bulb. The composite bulb comprises a metal bulb made of a metal material, and a nonmetal housing wrapping the external surface of the metal bulb. The artificial hip joint employs the composite bulb, and the wear-resistant nonmetal housing wraps the metal bulb. The artificial hip joint is large in supporting strength, is high in bearing force, effectively reduces the maximum contact stress of the nonmetal housing, is stable and reliable, and is not liable to be damaged. Because the interior of the artificial acetabulum is not provided with the liner, the size of the composite bulb can be increased, thereby improving the motion range of the joint, reducing the collision between a thigh stem trunk and the boundary of an acetabulum cup, reducing the dislocation risks of the acetabulum and the composite bulb, prolonging the service life of the artificial hip joint, and improving the use function of the artificial hip joint.