Abstract: In the high-speed railway catenary system, the high precision dropper calculation is very complex, it is an important problem in high-speed railway electrification construction. This article introduced the multi-purpose dropper calculation software of high-speed railway catenary suspension with Visual Studio 2012 c # platform and Access database in detail. This software was applied to multiple high-speed railway projects. The application results showed that the dropper calculation was with high accuracy, could greatly improve the efficiency of dropper calculation and the precision of construction, reduce construction cost.