The invention discloses an ultrasonic-modulation micro electro-chemical machining experiment system, and belongs to the technical field of complex precise and micro non-traditional machining. The ultrasonic-modulation micro electro-chemical machining experiment system comprises an ultrasonic vibration system, an electrolytic machining system, a synchronization wave chopping system, a servo feeding system, a short-circuit protection system, an electrolyte circulation system and an on-line parameter adjustment system. The ultrasonic-modulation micro electro-chemical machining experiment system allows micro electrolytic machining and ultrasonic frequency vibration to be at the same frequency and to be synchronized, an electrolytic passive film is eliminated by an ultrasonic frequency vibration effect, and a machining gap is improved effectively; a working table is driven to feed by a servo motor, and the machining gap and the machining velocity can be controlled and adjusted; electrolytic interelectrode electric current is detected in real time, electric current of an electrolytic machining return circuit can be timely cut off, and the function of short-circuit protection can be realized; an electrolyte of the circulation system circularly flows and is renewed, electrolytic products are washed away, and configurations of the electrolyte can be adjusted and controlled in real time according to the experiment requirements. The ultrasonic-modulation micro electro-chemical machining experiment system realizes the effects that parameters of the ultrasonic-modulation micro electro-chemical machining experiment system can be configured and adjusted on line in real time, and realizes the purposes of systematized, intelligentized, high-precision and high-efficiency machining.