Abstract: The determination of the resistance along the route of the fire water supply system provides a theoretical basis for the design of fire water supply and the practical application of fire water supply. In order to deepen the students' deep understanding of the resistance along the water supply system, based on the resistance measurement experiment in the typical experimental teaching, a teaching device for measuring the resistance of the fire water supply system with detachable pipes was developed. The device prepares resistance pipes based on the screening results of drag reduction materials by simulation software Materials Studio. The designed detachable resistance pipes are convenient for comparing the effects of fluid properties, pipe wall roughness and other factors on the resistance along the route. At the same time, the photographic equipment was added to realize the quantitative analysis of the experimental data. The device is used to carry out a teaching mode that combines theoretical explanation, simulation and experimental demonstration, can help cultivate the students' software application ability, and improve scientific research thinking and independent innovation ability.

Key words: firefighting water supply system, resistance along the route, teaching device, simulation