The thesis presents a parametric design tool for plate structural analysis. The goal of the thesis is to establish a real-time visualized program for structural calculation and to make it parameterized. The tool is based on a visualized drawing program Rhino with Grasshopper plug-in to generate the parametric environment for the plate structural analysis. The solution of plate analysis is computed by membrane analogy. Followed by rain-flow analysis, the relation between shear force flows and the structural geometry is presented. Two computational programs will be introduced. One is out-of-plane tool; the other is for in-plane calculation.