The measurement of urban pipe network flow is an important task for water supply enterprises in pipe network management. Over the past few years, our company has used Japan Fuji portable ultrasonic flowmeter to determine water consumption for large water users, and persuaded and eased the "supply and demand" contradiction between these enterprises and companies with scientific data; In particular, the flow measurement work in the preparatory work of "leading loose into long" project provides a reliable basis for the adjustment of Changchun urban pipe network. The following is a brief introduction of our company in the flow measurement work of some practices and experience. To find out the working condition of the water supply network at different times, improve the dispatching level of the network and ensure the supply.