Friction pendulum seismic isolation system

The invention discloses a friction pendulum seismic isolation system. The system comprises a friction pendulum, wherein the friction pendulum comprises an upper support plate (5) and a lower support plate (8) which are oppositely arranged, the two sides of the upper support plate and the lower support plate are connected into a whole through shear pin keys (1), the middle parts of the upper support plate and the lower support plate are in sliding connection through a first spherical hinge structure; the top surface of the lower support plate is covered with a wear-resisting plate (7), multipleareas with different friction coefficients are sequentially distributed on the upper surface of the wear-resisting plate from inside to outside, the friction coefficient of the solid circle area located at the most central part is the minimum, and the friction coefficient of the solid circle area is matched with frictional force required for starting of the friction pendulum under the condition of frequent earthquake; th