The invention provides a fracturing system pressure test fault rapid positioning method. The method comprises the following steps that fracturing devices in the fracturing system are grouped for multiple times, the main controller gives out signals to enable the fracturing devices of all groups to output pressure, all the fracturing devices controlled by branch controllers participate in outputting pressure; when pressure fed back by a bus pressure sensor reaches a set value, the pressure is maintained; after a period of pressure maintaining, a current pressure signal output by the bus pressure sensor is read and compared with the preset pressure value, and if the current pressure value is within the setting range of the preset pressure value, the pressure test is completed; if the currentpressure value exceeds the setting range of the preset pressure value, a fault alarm is output, a fault positioning step is started, and fracturing system pressure test fault rapid positioning is realized. According to the method, the safety of the pressure testing operation is greatly improved, pressure testing efficiency is improved, and by adopting a scheme of grouping and calibrating a pressure increase curve, a fault point can be quickly positioned.