This paper shows a python based GUI simulation software, named DSoft, which underlies the analytical approach to the McCabe-Thiele graphical method to simulate the equilibrium stage model for a continuous feed binary distillation column. The software, DSoft, calculates theoretical stages, actual stages at all ranges of Murphree tray efficiency, feed tray location, and boil-up ratio for any given input of feed quality, product compositions, and reflux ratio. Along with the analytical solution, it plots the McCabe-Thiele diagram, Composition Profile, and Feed Tray Optimisation curve. Moreover, two case studies are carried out and the results are verified with existing commercial software. As a result of the case study simulation, further research studies, observations & inferences are carried out. DSoft is a simple, compatible, platform-independent, standalone software that can be used for educational, research & development, industrial purposes, etc., demonstrating both analytical & graphical approach with a detailed solution to the user.