The utility model discloses a large-roof and large-span cornice bucket arch steel skeleton of an archaized architecture. A cornice part obliquely arranged on a main body structure comprises a cornice skeleton and a bucket arch skeleton; the cornice skeleton is a pipe truss, and is supported by an inclined plane formed by a lower supporting steel column, a lower supporting steel pipe column and an upper supporting column which are rigidly connected with the pipe truss; the bucket arch skeleton consists of a bucket arch diagonal bracing, a bucket arch horizontal beam and a bucket arch small cross beam; the bucket arch diagonal bracing is spatially perpendicular to the bucket arch horizontal beam; and the bucket arch small cross beam is arranged horizontally. The cornice bucket arch steel skeleton can perfectly realize architectural modeling of an archaized large-span roof, and is applied to large-span archaized roof structures.