The embodiment of the utility model discloses a high voltage output device for feeder automation test, accept DA output signal and convert the range into through the mode that the phase place was changed to equal just two way control signal of looks phasic difference 180 through the bridge type structural circuit, this two way control signal controls enlargeing of two independent ranges and power amplifier range of carrying on and power respectively, before feeding back, bring in two way signals after amplifying precision and the stability of guaranteeing signal output through the mode of hardware negative feedback, because the complete symmetry of circuit structure of two parts, we obtain the voltage output of two way voltage -to -grounds for 0 -120V and looks phasic difference 180 from this, we saw the output of a passageway into referring to to ground this moment, alright output in order to obtain the high voltage. Compared with the prior art, the embodiment of the utility model provides a directly realizing high voltage output through hardware circuit, greatly having improved the output voltage range of feeder automation tester, the wiring is more simple and convenient when making the on -the -spot test.