At present,the method of multi-segment line fitting or point fitting is often used to form approximate spiral lines for the end groove of mechanical seals,which is inefficient and inaccurate in simulation results.A logarithmic spiral groove drawing method driven by parameter equation with higher accuracy was proposed.SolidWorks was redeveloped based on Visual Basic programming language,and the parametric modeling of the end face of the moving ring and its fluid calculation domain of the expanded self pumping mechanical seal was realized.The research shows that the parameterized model can easily modify the seal face structure and fluid domain parameters.The drawing of groove is faster,the drawn groove line is smoother,and closer to the true groove curve.Parametric modeling results can be imported into ICEM and other software for processing,which lays a technical foundation for improving the efficiency of numerical simulation of the performance of self-pumping mechanical seal.