The invention discloses an experimental device for measuring lightning impulse voltage endurance of insulating liquid. The experimental device comprises a fixed seat, a high-voltage electrode component, a grounding electrode component and a test channel, the fixed seat comprises an upper insulating cover plate and a lower insulating cover plate, the upper insulating cover plate is provided with afirst assembly through hole, the lower insulating cover plate is provided with a second assembly through hole, the high-voltage electrode component comprises a pin electrode and a first conducting rod, the first conducting rod comprises a first mounting end and a first terminal, the pin electrode is arranged at the first mounting end, the grounding electrode component comprises a ball electrode and a second conducting rod, the second conducting rod comprises a second mounting end and a second terminal, the ball electrode is arranged at the second mounting end, and the pin electrode and the ball electrode are positioned below the liquid level of the insulating liquid to be measured. As the experimental device is simple in structure and light in weight, experimental operation steps can be simplified, cost can be reduced, split cleaning and maintenance after experiments are facilitated, and the experimental device is convenient to assemble and disassemble.