The invention discloses a hydraulically-driven high-pressure pulse fluid output device. The hydraulically-driven high-pressure pulse fluid output device comprises a pump source device, a fracturing fluid supplying device, two sets of fluid pulse generators which are arranged in parallel and are of the same structure, and a servo control system. The pump source device is used for storing water andproviding pressure for the water so as to simulate the deep medium-pressure large-flow hydraulic conditions. The fracturing fluid supplying device is used for providing continuous low-pressure fracturing fluid. The fluid pulse generators utilize the medium-pressure large-flow water output by the pump source device as a power source to convert the continuous low-pressure fracturing fluid into high-pressure pulse fluid to be output. The servo control system is electrically connected with the two fluid pulse generators so as to control the two fluid pulse generators to work alternately. The pulsegenerators of the hydraulically-driven high-pressure pulse fluid output device are provided with two sets of pulse superchargers for alternating output of the high-pressure pulse fluid, thus the output demand of high and low frequency pulse fluid within a large range can be met; and the pulse output process is controlled by a servo controller in a servo mode, and the frequency accuracy of the pulse fluid output process is ensured.