Line　width-tunable　lasers　have　wide　applications　in　the　fields　of　high-resolution　spectroscopy,　optical　communications,　and　other　industry　and　scientific　research.　Here,　manipulating　plasmonic　scattering　of　metal　particles　with　plenty　of　nanogaps　is　proposed　as　an　effective　method　to　achieve　line　width-tunable　random　lasers.　Assisted　by　the　nonlinear　optical　effect　of　the　surrounding　medium,　the　multiscale　scattering　material　demonstrates　the　transition　from　local　scattering　of　nanogaps　to　large-scale　profile　scattering　by　increasing　the　pump　power　density.　Based　on　these　two　scattering　processes,　random　lasers　can　be　continuously　driven　from　a　narrow-line-width　configuration　to　a　broad-line-width　regime,　demonstrating　that　line　width　variation　exceeds　2　orders　of　magnitude.　This　phenomenon　may　provide　a　platform　for　further　studying　the　conclusive　mechanism　of　random　lasing　and　supply　a　new　approach　to　tune　the　line　width　of　random　lasers　for　further　applications　in　high-illumination　imaging　and　biology　detection.