The three-dimensional model of a crankshaft on VMC40N flying shear in Magang was established. The crankshaft stress
displacement and fatigue strength are calculated with Pro/Engineer based on the simple model with the condition that inertia and gravity of shear mechanism were neglected. The Analysis and improvement design of this crankshaft are made. It is convenient and efficient to design and check the complex crankshaft with pro/E.