The invention discloses a water transportation pipe network calculation method based on the node parameterization technology, and relates to the field of water conservancy. The method comprises the steps of initializing a pipe network system to be tested; decomposing the initialized pipe network system to be tested into parameterization nodes and a calculation pipeline connected between two adjacent parameterization nodes; by calculating pipeline connection parameters and node connection parameters, connecting and combining the calculation pipeline with the parameterization nodes; judging whether the current calculation time is a model control end time or not, and if yes, completing calculation of the whole pipe network with pressure in the pipe network system to be tested at the current time; if not, executing the step 1 again till the current calculation time is the end time, and completing calculation of the whole pipe network with pressure in the pipe network system to be tested at the current time. According to the water transportation pipe network calculation method, on the basis of pipe network decomposition and rapid calculation, analog calculation precision can be well ensured, and the calculation result is as good as that of business software Hammer.