The invention discloses a precise high-current transient current rise generating device, which comprises an IO input device unit, a microcomputer control unit, a digital signal control processing unit, a D/A converter, an A/D converter, an output current acquisition unit, a high-power linear current power amplifier unit and a three-phase DC rectifier filter power supply for providing power for the high-power linear current power amplifier unit. The current acquisition unit acquires and measures transient high-current signals, the A/D converter converts the transient high-current signals into digital signals, the digital signals are transmitted to the digital signal control processing unit, and the amplitude and the waveform of the transient high-current signals are obtained through operation processing by the microcomputer control unit. Operation calculation processing on transient signals in many ways is completed via the microcomputer control unit, and through control on the D/A converter by the digital signal control processing unit, output of the transient analog signals is realized.