The invention discloses an earthquake-proof steel bearing for a bridge. The earthquake-proof steel bearing comprises a lower steel plate and a middle steel plate which are interconnected into an integral body, wherein ring-shaped grooves are formed in the middle steel plate; elastic sheets are bonded to both side walls of each of the grooves; a plurality of cylindrical lead cores are arranged in each of the grooves; an upper steel plate is located above the middle steel plate; the upper steel plate is fixedly connected with the tops of the cylindrical lead cores; a sliding layer is arranged between the upper steel plate and the middle steel plate; and the sliding layer comprises a stainless steel plate and a flat polytetrafluoroethylene plate. According to the earthquake-proof steel bearing disclosed by the invention, the lower steel plate, the middle steel plate and the upper steel plate are all made of steel materials; and the sliding layer which consists of the stainless steel plateand the flat polytetrafluoroethylene plate is low in friction force. The earthquake-proof steel bearing disclosed by the invention is high in vertical bearing capacity, uniform in damping distribution and simple in manufacturing process, and has the characteristic of resisting earthquake bidirectionally. When an earthquake occurs, the cylindrical lead cores can quickly react, and yield and deformafter being subjected to stress, so that the impact effect of the earthquake on a main beam can be effectively relieved, and the beam-falling hazard can be prevented.