On the basis of summing up the experience and lessons of monitoring pipeline flow over the past years, this paper applied the multi -channel supersonic Doppler flowmeter to successfuUy obtain the rainwater flow process with a 5min frequency, which has improved the monitoring stability and the reliability of monitoring results. This makes it possible to use multiple data to determine the parameters of the uii>an flood model and verify it. One dimensional models of MIKE, SWMM and InfoWoiics were built in typical urban areas. According to the relevant regulations, the parameters were checked and calibrated based on the scientific analysis of rainfall data, water level and flow data. And the verification results meet the requirements of the "Technical Regulations for the Application of Mathematical Model of Internal Flood Control System". Through the error analysis, the optimized model simulates better in pipeline flow, of which the accuracy is higher in the prediction of waterlogging analysis. The error between the simulated and the measured value is within 10%.