Attempt to reduce the CO2 emission from ships and sailing cost, the rate of propeller cut is calculated by established models of propeller diameter cut and propeller blade shape cut. According to the results, after cutting the edge of propeller under equal power, the rev is increased, but the open water efficiency and the speed both are decreased. However, the increase of the rev is quicker than the decrease of the speed. And the AVL BOOST is used to simulate MAN B&W 5S60MC main engine. The main running parameters under the 25%, 50%, 75% and 85% load are calculated. The result indicates that cutting the edge of propeller can increase the rev, improve lubricating and vibrating, reduce oil consumption and improve the economical efficiency.