In order to study the influence of three types of tapered sections on the internal flow field state and current limiting performance of the current limiting Venturi tube, a test has been made of the fluid performance of three different tapered sections of the Venturi tube under normal water make-up and critical conditions to study their pressure loss and current limiting characteristics. In addition, based on ANSYS Workbench, a numerical simulation is carried out of the test conditions. The results show that the errors between the calculated outlet pressure and the test value are 2.0%, 0.5% and 0.5% respectively, which are in good consistent with the test results. The simulation results show that the pressure loss coefficient is related to the type of Venturi while independent of the velocity of the pipe flow field. The pressure loss performance of the tapered section is better than that of the tapered section, which is curved twice, with a pressure loss value of approximately 90% of the curved once shape. The tapered section, which is of the traditional linear type, is characterized with the worst pressure performance. Under critical conditions, the three kinds of Venturi tubes can better perform the current limiting effect due to cavitation, but the tapered section with two smooth arc transitions is more favorable for cavitation reaction in the pipeline due to its uniform structure, which makes the current limiting effect much improved.