The invention provides a matching system and method for trigger signals and trigger modes of a high-voltage-switch operation characteristic tester. The system comprises a trigger-signal generation module and an upper computer, and also comprises a signal processing module, a synchronous detection unit, a timer, an electronic analog switch and a synchronous-trigger-mode switching unit, wherein the signal processing module is used for receiving data transmitted by the upper computer, giving a fracture closing order or a fracture opening order and achieving signal synchronous control, detection and reduction; the synchronous detection unit is used for detecting the trigger signals generated by the trigger-signal generation module and outputting signals capable of being identified by the signal processing module; the timer is used for timing the signals converted by the synchronous detection unit according to time intervals generated by the trigger signals set by the signal processing module; the electronic analog switch is used for completing fracture opening operation and fracture closing operation according to a switch off or on order emitted by the signal processing module; the synchronous-trigger-mode switching unit is used for converting the trigger modes of the high-voltage-switch operation characteristic tester into external synchronous trigger modes.