Aiming at the problems of complicated design and low manufacturing efficiency of aviation catheter welding tooling, this paper studied the rapid design scheme of aviation catheter welding tooling, established the standard positioning component library, and proposed the constraint algorithm between positioning component and catheter and the key algorithm of parametric construction of non-standard support. Based on CATIA, the rapid design software of aviation conduit welding tooling was developed to realize the rapid design of aviation conduit welding tooling and the rapid assembly of standard parts. The fast design algorithm studied in this paper is applied to the software, and the results show that the software design time is reduced by 97% compared with the traditional design method, which provides a method for enterprises to reduce costs and improve efficiency, and has certain engineering practical application significance.