Ultrasonic　rolling　technology　is　an　economic　and　efficient　means,　and　a　new　surface　finishing　and　strengthening　technique　which　can　effectively　improve　the　quality　of　metal　surface.　H13　die　steel　was　coated　with　iron　base　alloy　by　laser　cladding　technology,　and　the　effect　of　ultrasonic　rolling　process　parameters　on　the　surface　microstructure　and　quality　of　laser　cladding　layer　were　investigated.　SEM,　EDS　and　XRD　were　carried　out　to　study　the　microstructure　of　the　rolled　surface,　and　surface　roughness　instrument,　white　light　interferometer,　hardness　tester　and　residual　stress　tester　were　performed　to　measure　their　roughness,　hardness　and　residual　stress.　The　results　show　that　the　microstructure　of　the　cladding　layer　was　refined　obviously　after　ultrasonic　rolling.　The　grain　size　increases　gradually　with　the　increase　of　the　depth　from　the　surface,　and　the　direction　of　microstructure　deformation　is　the　same　as　that　of　ultrasonic　rolling.　The　surface　roughness　after　rolling　has　a　linear　positive　correlation　with　the　initial　surface　roughness.　With　increasing　reduction,　static　pressure,　rolling　rate　and　rolling　times,　the　surface　roughness　decreases　first　and　then　increases,　and　the　surface　hardness　increases　first　and　then　decreases.　The　surface　residual　stress　increases　first　and　then　decreases　with　the　increase　of　reduction,　static　pressure　and　rolling　times.　The　metal　surface　has　a　good　finishing　and　strengthening　effect　at　the　value　of　reduction　of　0.10　mm,　static　pressure　of　0.45-0.65　MPa,　rolling　rate　of　2　100　mm/min　and　rolling　times　of　3.　©　2022　Editorial　Office　of　Chinese　Journal　of　Mechanical　Engineering.　All　rights　reserved.