The invention discloses a laser cladding parameter screening method for preparing gradient functional materials by laser cladding. According to the laser cladding parameter screening method for preparing the gradient functional materials by the laser cladding, after gradient functional material samples of different laser parameters are prepared utilizing a 3D printer, melting path section cracking, melting path fluctuating, melting path inclining and sample surface unmelted powder are observed correspondingly through horizontal lap melting path detection and longitudinal lap melting path detection to screen out the optimal laser cladding parameters. The laser cladding parameter screening method for preparing the gradient functional materials by the laser cladding is simple, and aiming at laser cladding processing of the different gradient functional materials, the laser cladding parameter screening method can be adopted to screen and obtain the optimal laser cladding parameters; and bymeans of the laser cladding parameter screening method for preparing the gradient functional materials by the laser cladding, systematic laser cladding quality assurance and evaluation system are provided for preparing the gradient functional materials adopting the laser cladding technology, so that the optimal laser cladding parameters in the laser cladding processing can be rapidly obtained.