The invention relates to a method for optimizing the parameters of a laser cladding process on a plane. The method for optimizing the parameters of the laser cladding process on the plane comprises the following steps: S1, taking a laser power, a scanning speed and a powder feeding speed as the parameters to be optimized, designing an orthogonal experiment according to a Taguchi method, and takinga weld width, a weld height and a dilution rate as response targets and carrying out variance analysis; S2, analyzing the three response targets by virtue of a grey correlation analysis method and then obtaining the final optimal parameter combination; S3, fitting the outline of a cladding layer under the final optimal parameter combination into a function and establishing a geometric model, calculating and analyzing, and then obtaining the optimal value of an overlapping rate; and S4, carrying out multi-channel and multi-layer cladding experiment, calculating and analyzing, and then obtaining the optimal value of a Z-axis lifting amount. The method for optimizing the parameters of the laser cladding process on the plane is capable of conveniently, rapidly, accurately and reliably obtaining the optimal parameters in a single-channel cladding process, a single-channel and multi-layer cladding process and a multi-channel and multi-layer cladding process when different cladding powders and/or laser cladding devices are used for carrying out laser cladding experiment on the plane.