The invention provides a steel scaffold capable of being conveniently disassembled and assembled and an application method thereof, and relates to the technical field of machinery. The steel scaffoldcomprises a base, a support framework, and a workbench; the base is provided with a plurality of steel plates, the bottoms of the steel plates are provided with foot-brake type rollers, the top ends of the steel plates are provided with first base square pipe sleeves, and one sides of the first base square pipe sleeves are provided with second base square pipe sleeves; and the support framework isprovided with first support frames, one sides of the first frames are provided with second support frames, one sides of the second support frames are provided with third support frames, one sides ofthe third support frames are provided with fourth support frames, the outside of the top end of the workbench is provided with guardrail baffles, and the bottom end of the workbench is provided with aplurality of first workbench bolts and second workbench bolts. Assembly and disassembly are convenient and simple, convenient using can be brought to people, work efficiency is enhanced, and the timeof assembly and disassembly is reduced; and the steel scaffold capable of being conveniently disassembled and assembled is convenient and fast to carry, simple to use, safe and effective, simple in structure, and convenient to promote.