Channel water utilization coefficient is an important indicator to measure channel water delivery efficiency and level of water-saving management,as well as the iconic indicators of the changing irrigation area and the development of the water-saving irrigation. Ganfu channels at all levels to test the original irrigation channels, combined with the practical application of a variety of channels flow velocity measurement instruments, to channel the flow test, and comparative analysis, as well as channels for water use coefficient measurements using moving water law.The determination is discussed how to fast determination of canal water utilization coefficient.