The invention relates to a double-layer impact-proof assembled steel structure truss steel bar processing anti-smashing shed. The shed comprises a support unit comprising two square pipe columns and asupport frame, and column legs are arranged at the lower ends of the square pipe columns. The support frame comprises an inter-column truss connected between the upper ends of the two square pipe columns. Three inner trusses are uniformly connected on the other three sides of the upper end of each square pipe column. A rectangular frame composed of four outer trusses is arranged around the outerperiphery of six inner trusses, and each of the inner trusses, the outer trusses and the inter-column truss includes a truss upper chord, a truss lower chord and a truss web. A transverse brace is arranged between the two square pipe columns, and oblique braces are arranged between the side walls of the square pipe columns and the inner trusses. Elastic wooden formworks, steel wire meshes and color steel plates are laid on the upper and lower parts of the support frame, and advertisement boards are laid on the outer side of the outer trusses. The double-layer impact-proof assembled steel structure truss steel bar processing anti-smashing shed provided by the invention is convenient to assemble, stable in structure and high in safety performance.