Shipbuilding industry is known as the top of all industries. The world No.1 shipbuilding country has been the long-cherished wish for China. With the continuous increase of economic and technical strengths, China’s dream of becoming the world No.1 shipbuilding country seems to come close. However, crank-shaft as the heart of engine which is the heart of large-size ships often makes us in the state of embarrassment. Now, after some twists and turns, in terms of large marine crankshaft, China has broken through the technology barriers set by foreign crankshaft manufacturers and can make our own heart for large-size ships. Though domes-tically produced crankshafts can’t meet our demands at the moment, it will give our people more imaginations be-cause Chinese shipbuilding industry has now had the strengths to gallop the world. Shipbuilding industry is known as the top of all industries. The world No.1 shipbuilding country has been the long-cherished wish for China. With the continuous increase of economic and technical strengths, China’s dream of becoming the world No.1 shipbuilding country countries However, crank-shaft as the heart of engine which is the heart of large-size ships often makes us in the state of embarrassment. Now, after some twists and turns, in terms of large marine crankshaft, China has broken through the technology barriers set by foreign crankshaft manufacturers and can make our own heart for large-size ships. Although domes-tically made crankshafts can not meet our demands at the moment, it will give our people more imaginations be-cause Chinese shipbuilding industry has now had the strengths to gallop the world.