Pulse high-voltage load circuit and working method

The invention discloses a pulse high-voltage load circuit and a working method. The pulse high-voltage load circuit comprises an isolation power supply, a dead space complementation PWM (Pulse Width Modulation) generation unit, a high-end signal isolation unit, a low-end signal isolation unit, a plurality of high-end signal isolation driving units, a plurality of low-end signal isolation driving units and a plurality of switching modules. The circuit and the method provide by the invention are used for equipment for testing dynamic load capacity of a high-voltage DC (Direct Current) power supply; the series of equipment supports multiple paths of pulse loads; a resistance value, internal pulse frequency and a duty ratio are adjustable; external pulse synchronous testing is supported; expansibility of the equipment is high; testing under a higher voltage and higher frequency can be supported.