In this paper, an interface-tracking method combined with the Moving-Grid Finite-Volume method is presented for simulating free surface flows. In the interface-tracking method, the calculation grid is moved and deformed according to the movement of the free surface. For tracking free surface, surface height equation for the free surface shape was solved. We applied this method to some flow cases with free surface. Numerical results show that the present new flows simulation method using Moving-Grid Finite-Volume method is very accurate and have a promising feature for free surface flows.