A fast modeling program for composite laminate joints by Python was developed to realize auto-modeling. Parametric modeling program can design and analyze parameters such as single layer thickness of laminate, lay-up sequence, lay-up angle, bolt diameter and arrangement form, bolt edge distance and end distance. This paper discusses the interface between ABAQUS and Python and the method of calling the command order. GUI interface is written through RSG, which greatly simplifies the user’s operation process. The user-defined material subroutine was developed by FORTRAN language to realize the secondary development of material failure criterion and stiffness degradation, and embedded in the fast modeling program to realize the parametric modeling of composite laminate joint strength analysis. The rationality of modeling method was proved by comparing the results of FEM and experiments. Comparative analysis of failure mode and damage load, the error is within 10%, the error is considered acceptable in engineering. This study can provide a reference for modeling the composite joints.