The invention relates to an elastic body pressure ball socket device for a crown-shaped cage of a miniature bearing. The elastic body pressure ball socket device for the crown-shaped cage of the miniature bearing comprises a base, a core column, a concave mold, an elastic body column and a convex mold pressing head. The core column is composed of a small diameter part and a large diameter part which are integrally connected. The concave mold comprises two butted concave mold bodies. An axial central through-hole is formed after butting. The central through-hole comprises a cage placing part, an elastic body column placing part and a core column clamping part from top to bottom. Extrusion holes which correspond to the ball sockets on the cage to be machined in number and position are formedin the inner wall, located at the cage placing part, of the concave mold in a distributing mode. A blind hole is formed in the upper end surface of the base. The diameter of the blind hole is suitable for the outer diameter of the concave mold. The convex mold pressing head is arranged above the concave mold, and is connected with a press machine in a transmitting mode. According to the pressureball socket, a traditional rigid convex mold is replaced by the elastic body, the manufacturing difficulty of the mold is reduced, and uniformity of the pressure ball socket is improved, and the machining accuracy is high.