Informations can be drawn from the comparison that the results of analysis and test have value gaps around 20% because of taking the environmental influences from test site into account. Such as the shearing force is calculated based on traditional empirical formula, whose value is bigger than actual value and leads to greater shear stress in later finite element analysis. The overall data are within the allowed range except individual testing points. The conclusion can be drawn that the forgoing finite element method[9] is reliable and the calculation results of maximum stress of throat fillet are also accords with the actual working mode.