In order to fabricate an upper or lower chord blank of the C919 plane, different scanning paths are set with different laser solid forming (LSF) process parameters based on style-database of LSF. A test region is calculated using offset algorithm of the scanning path. “Similar scanning path” is automatically found by using parameters of the above test region and “hit probability” and a same style number is set for the next path. A numerical control operation file is automatically generated in terms of the style of every scanning path. What is concerned is how to set different process parameters for different scanning paths and transfer the style of the scanning path. Using this method, the operational complexity of process designer is reduced, and human factors are excluded during the manufacturing process. Processing design and manufacturing operation are separated and airworthiness certification requirements are satisfied.