The invention discloses a two-stage-adjustable steam plasma swirl burner. The two-stage-adjustable steam plasma swirl burner comprises a first-stage plasma ignition device, a second-stage plasma adjuster and a steam supply system. The first-stage plasma ignition device comprises a primary air pipeline, an internal combustor, a rich-lean separator, a swirl generator, a first-stage steam inlet pipeline, a central air pipeline and a first-stage plasma generator. The second-stage plasma adjusting device comprises a second-stage steam inlet pipeline, a second-stage plasma generator, an internal secondary air inlet pipeline and an external secondary air inlet pipeline. The two-stage-adjustable steam plasma swirl burner solves the problems that combustion is hardly stable and the NOx pollutant emission is high, is especially suitable for meager coal, smoke-free coal and the coal which is difficult to ignite and generates a large amount of NOx pollutants and has the effects of being low in nitrogen and stable in combustion.