this paper conducts experimental research on the laser polishing process of Ti6Al4V material,and analyzes the influence of laser parameters on the polishing laser,mainly studies the influence law and mechanism of the three parameters of laser output power,defocus e and the laser spot overlap rate δ.Combined with the sample surface roughness measurement value Ra,the conclusion is got:when the laser output power is set to approximately 300 W,the defocus e is controlled within the range of 6～8mm,and the spot overlap rate δ is within the range of 70%～75%,the pulsed laser has the best polishing effect on the surface of TC4 alloy material.Finally,by optical microscope measuring instrument,the surface morphology of the polished material and the internal lattic grain change of the polished layer are analyzed,the effect of polishing on the physical properties of the polished layer of the sample is analyzed,and the hardness of the sample surface before and after polishing is compared.