Traditionally, design the work often involving number value and calculating in the rectifying tower: Pascal which a lot of number value procedures had already used in some standard programming languages in the past several years, C ++ or Visual Basic are come to develop, and some number value algorithm software package, Java applets in MATLAB or the Web -oriented tool is developed. [1]They are common because of such a thought, utilize checking experiment form data that number value getting more, then person who insert they liquid phase balanced to make vapour(liquid balanced vapour) Curve, this sets out actually, according to different rectifying tower design methods. As the second step, it is an approximate equation of speed of different balance that is calculated. However, it is reported, fixing some tower parameters, (such as the quantity of the tower board or its their position, only quote two examples) Can very easy to influence by various errors, because one incorrect to is it produce one cost high tower or is it separate efficiency reduce to make to design.