The invention discloses a conversion type friction pendulous shock absorption and isolation support, and relates to the technical field of bridges. The support comprises a hyperboloid body, a spherical wear-resistant sliding plate I and a spherical wear-resistant sliding plate II are connected to the upper curved surface and the lower curved surface of the hyperboloid body respectively, an upper pendulum and a lower pendulum are arranged on the upper portion and the lower portion of the hyperboloid body respectively, a plane wear-resistant sliding plate is connected to the upper surface of the upper pendulum, a plane steel plate is arranged on the upper portion of the upper pendulum, a downwards arranged steel baffle is arranged at the end of the plane steel plate, a steel baffle ring which locks the upper pendulum is arranged on the lower pendulum, the steel baffle ring is fixed on the lower pendulum through an anti-shear pin, and an elastic body is arranged between the upper pendulum and the steel baffle; a bridge cannot be lifted, the bridge structure reciprocating lifting problem is solved, no relative movement is generated between all components under the normal working condition, and the problem that due to the fact that the spherical war-resistant plate is subjected to friction for a long time, the service life is greatly shortened is solved; the anti-shear pin is cut off under the E2 seismic working condition, relative movement can be generated between the components, and friction pendulous movement is formed.